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V8 engine
V8 engine
from Wikipedia

A first generation Chevrolet small-block V8, manufactured 1954–2003
The AMC V8 engine was manufactured 1956–1991; pictured here, the AMC 390, installed in an AMX

A V8 engine is an eight-cylinder piston engine in which two banks of four cylinders share a common crankshaft and are arranged in a V configuration.[1]

Origins

[edit]
Antoinette 8V in a 1909 Antoinette VII aircraft
Vulcan automobile engine (c. 1919)
1914–1918 Hispano-Suiza 8A airplane engine

The first known V8 was the Antoinette, designed by Léon Levavasseur, and built in 1904[2] by the French Antoinette company for use in speedboat racing, cars, and later, airplanes.[3] [4]

Also in 1904, V8 engines began small-scale production by Renault and Buchet for use in race cars.[citation needed]

Design

[edit]

V-angle

[edit]
1917 Liberty L-8— an aircraft engine with a V-angle of 45°

Most engines use a V-angle (the angle between the two banks of cylinders) of 90 degrees. This angle results in good engine balance, which results in low vibrations.[5] However, the downside is the greater width of the engine compared to those that use a smaller V-angle.

V8 engines with a 60-degree V-angle were used in the 1996–1999 Ford Taurus SHO, the 2005–2011 Volvo XC90, and the 2006–2009 Volvo S80. The Ford engine used a 60-degree V-angle because it was based on a V6 engine with a 60-degree V-angle. Both the Ford and Volvo engines were used in transverse engine chassis, which were designed for a front-wheel-drive layout (with an on-demand all-wheel drive system in the case of the Volvos). To reduce the vibrations caused by the unbalanced 60-degree V-angle, the Volvo engines used a balance shaft and offset split crankpins.[6] The Rolls-Royce Meteorite tank engine also used a 60-degree V-angle, since it was derived from the 60 degree V12 Rolls-Royce Meteor which in turn was based on the Rolls-Royce Merlin V12 engine.[7]

Other V-angles have been used occasionally. The Lancia Trikappa, Lancia Dilambda, and Lancia Astura, produced 1922–1939, used narrow angle V8 engines (based on the Lancia V4 engine) with V-angles of 14–24 degrees.[8] The 1932 Miller four-wheel drive racing cars used a V8 engine with a V-angle of 45 degrees.[9] The 8-cylinder versions of the 1945 through 1966 EMD 567 diesel locomotive engine also used a V-angle of 45 degrees.

Crankshaft configuration

[edit]

Cross-plane crankshaft

[edit]
Standard firing configuration of a cross-plane V8, with a 90 degree V-angle

Most V8 engines fitted to road cars use a cross-plane crankshaft since this configuration produces less vibration due to the perfect primary balance and secondary balance.[10] The cross-plane crankshaft has the four crank pins (numbered from the front) at angles of 0, 90, 270, and 180 degrees, which results in a cross shape for the crankshaft when it is viewed from one end.

The rumbling exhaust sound produced by a typical cross-plane V8 engine is partly due to the uneven firing order within each of the two banks of four cylinders. A usual firing order of L-R-L-L-R-L-R-R (or R-L-R-R-L-R-L-L) results in uneven intake and exhaust pulse spacing for each bank. When separate exhaust systems are used for each bank of cylinders, this uneven pulsing results in the rumbling sound typically associated with V8 engines. However, racing engines seek to avoid these uneven exhaust pressure pulses to maximize the power output. The 1960s cross-plane V8 racing engines used long primary exhaust pipes (such as the Ford GT40 endurance racing car) or located the exhaust ports on the inside of the V-angle (such as the Lotus 38 IndyCar) to link the exhaust systems from each bank and provide even exhaust gas pulses),.

Flat-plane crankshaft

[edit]

A flat-plane crankshaft configuration provides two benefits. Mechanically, the crankshaft can be machined from a flat billet and does not require counterweights so it is lighter. However, it produces more vibration due to a secondary imbalance. Most early V8 road car engines also used a flat-plane crankshaft since this was simpler to design and build than a cross-plane crankshaft. Early flat-plane V8 engines included the 1910 De Dion-Bouton engine, the 1915 Peerless engine, and the 1915 Cadillac engine. A flat-plane crankshaft is used by many V8 engines fitted to racing cars.[11]

From the gas dynamics aspect, the flat-plane crankshaft allows for even exhaust gas pulses to be achieved with a simple exhaust system.[12] The design was popularized in motor racing by the 1961–1965 Coventry Climax FWMV Formula One engine, and the 1967–1985 Cosworth DFV engine was highly successful in Formula One.[13] Several production sports cars have used flat-plane V8 engines, such as every Ferrari V8 model (from the 1973 Ferrari 308 GT4 to the 2019–present Ferrari F8 Tributo), the Lotus Esprit V8, the Porsche 918 Spyder, and the McLaren MP4-12C.

Automobile use

[edit]

The first V8 engine used in a road-going car was the 1905 Rolls-Royce built in the United Kingdom. This model was initially equipped with a 3.5 L (214 cu in) V8 engine.[14] However, only three cars were made before Rolls-Royce reverted to using straight-six engines for their cars.[14][3]

In 1907, the Hewitt Touring Car became the first car built in the United States with a V8 engine.[15] The engine was designed and built by Edward R. Hewitt who emphasized the V8's superiority to the typical I4 and I6 and six-cylinder engines of the time because of its lower weight and easier to make crankshaft compared to the I6s of equal power as well as the V8 not taking much more space than a I4.[16]

The 1910 De Dion-Bouton— built in France— is considered to be the first V8 engine produced in significant quantities.[17][18]

The 1914 Cadillac L-head V8 engine is considered the first road-going V8 engine to be mass-produced in significant quantities, with 13,000 sold the first year.[3][19] This engine was built in the United States and was greatly assisted by Cadillac's pioneering use of electric starter motors.

The popularity of V8 engines in cars was significantly increased following the 1932 introduction of the Ford Flathead V8.[20]

By the early 21st century, the use of V8 engines in passenger vehicles declined as automobile manufacturers opted for more fuel efficient, lower capacity engines, or hybrid and electric drivetrains.[21]

Size, layout, and classification

[edit]

The displacement of modern V8 engines is typically from 3.5 to 6.4 L (214 to 391 cu in). However, size of production engines varies widely - for example the BMW M502 V8 introduced in the 1954 BMW 502 displaced only 2.6 L (2,580 cc), while the 1971-1978 Cadillac Eldorado was powered by an 8.2 L (500 cu in) motor. V8 engines intended for motorsport are often small and short-stroke to maximize RPMs and thus power. The Cosworth DFV 3.0 L (183 cu in) is an example.

Due to its large external dimensions, V8 engines are typically used in cars that use a longitudinal engine layout and rear-wheel drive (or all-wheel drive). However, V8 engines have also occasionally been used in transverse engine front-wheel drive vehicles, sometimes using closer cylinder bore spacings and narrower cylinder bank angles to reduce their space requirements.[22]

The classification of 'big-block' or 'small-block' refers to the engine's external dimensions and does not necessarily indicate the actual engine displacement. Engines with displacements from 6.0 to 6.6 L (366 to 403 cu in) have been classified as both small-block and big-block, depending on the particular manufacturer's range of engines.[23]

Motorsport

[edit]
1956 Lancia D50 Formula One engine
2006 Renault RS26 Formula One engine

V8 engines have been used in many forms of motorsport, from Formula One, IndyCar, NASCAR, DTM and V8 Supercars circuit racing, to Top Fuel drag racing.

Formula One

[edit]

Among the first V8 Formula One cars to compete were the 1952 AFM entry and the 1954 Lancia D50, with a development of the latter powering Juan Manuel Fangio's 1956 car to victory in the driver's championship. The 1.5 L Formula One era of 1961–1965 included V8 engines from Ferrari, Coventry Climax, British Racing Motors (BRM), and Automobili Turismo e Sport (ATS). The driver's championships for the 1962, 1963, 1964, and 1965 seasons were won by drivers of V8-powered cars.

From 1962 through 1965, the top three manufacturers in each season's Constructor's Championship all predominantly used V8 engines in their cars. In 1966, the engine capacity limits were increased to 3.0 L (183 cu in) (or 1.5 litres with a supercharger), and both the 1966 and 1967 Constructor's Championships were won by cars powered by the Brabham-Repco V8 engine.

From 1968 until 1981, the Cosworth DFV V8 engine dominated Formula One racing. During this time, the Manufacturers' Championship was won by Cosworth DFV-powered cars every season except 1975, 1976, 1977, and 1979, which 12-cylinder Ferraris won. After a long period of dominance, the Cosworth DFV was eventually outpaced by turbocharged straight-four and V6 engines.

The next period of significant V8 usage in Formula One was from 2006 to 2013, when the rules mandated use of 2.4 L (146 cu in) naturally-aspirated V8 engines, with regular power outputs between 730 and 810 hp[24] (in order to reduce the power outputs being achieved by the previous 3.0 litre V10 engines).[25] These were replaced by 1.6 litre turbocharged V6 engines for the 2014 and later seasons.

NASCAR

[edit]

V8 engines have dominated American premier stock car racing NASCAR series since its inaugural 1949 season. However, there wasn't a strict ruleset to follow until the 1972 season, when engines were no longer allowed to be any bigger than 358 cu in (5.9 L) for the purpose of reducing speeds caused by the rapid aerodynamic advancements from 1969 to 1971.

Drag racing

[edit]

In the American Top Fuel class of drag racing, V8 engines displacing 500 cu in (8 L) today produce outputs of over 7,000 kW (10,000 hp).[26] and 10,000 N⋅m (7,400 lb⋅ft).[27][28][29] The engines used in Top Fuel and Funny car drag racing are typically based on the aluminium-conversion Chrysler 426 Hemi engine and run on highly explosive nitromethane fuel.[30]

Land speed record racing

[edit]

The world's fastest non-jet-powered (i.e., piston-engine powered) wheeled land vehicle, the Speed Demon, which achieved a speed of 744.072 km/h (462.345 mph) in 2017, is powered by a V8 engine based on the Chevrolet small-block engine design.[31][32][33][34][35]

Automobile use by country

[edit]

Australia

[edit]
1991–1994 Holden V8 engine
2011 Ford Modular V8 ("Boss") engine

The first Australian-designed car to use a V8 engine was the 1965 Chrysler Valiant (AP6), which was available with an American-built 4.5 L (273 cu in) Chrysler engine. The first locally designed V8 Ford was the 1966 Ford Falcon (XR) and the first V8 Holden was the 1968 Holden HK, both using engines supplied by their parent companies in the United States.

The first V8 engine to be mass-produced in Australia was the 1969–2000 Holden V8 engine. This cast-iron overhead valve engine used a V-angle of 90 degrees and was built in displacements of 4.1 L (253 cu in) and 5.0 L (308 cu in), the latter being de-stroked to 5.0 L (304 cu in) in 1985. The Holden V8 engine was used in various models, including the Kingswood, Monaro, Torana, Commodore, and Statesman. Versions tuned for higher performance were sold by Holden Dealer Team and Holden Special Vehicles, including versions stroked to up to 5.7 L (350 cu in). The Holden V8 engine was also used in touring car racing and formed the basis of the Repco-Holden engine used in Formula 5000 racing. In 1999, the Holden V8 engine began to be replaced by the imported General Motors LS1 V8 engine.

In 1971, Ford Australia began local production of the Ford 'Cleveland' V8, an overhead valve cast-iron engine. The engine was produced in displacements of 4.9 L (302 cu in) and 5.8 L (351 cu in) for use in the Australian Ford Falcon and Ford Fairlane models. It was also used in several low-volume DeTomaso sports cars and luxury sedans built in Italy. Australian production ceased in 1982 when Ford Australia temporarily stopped production of V8 cars. From 1991 until 2016, the Ford Falcon was available with the imported Ford Windsor, Ford Barra, or Ford Modular V8 engines; the latter was marketed as "Boss" and locally assembled from a mix of imported and local parts.

A 4.4 L (269 cu in) version of the Rover V8 engine was produced in Australia for the ill-fated 1973–1975 Leyland P76 sedan. The engine had an overhead valve design and was the only all-aluminum engine made in Australia.

China

[edit]

The 1958–1965 Hongqi CA72 was a luxury car, of which approximately 200 were built for government officials.[36][37] It was powered by a 5.6 L (340 cu in) Chrysler LA engine and built on the chassis of a 1950s Chrysler Imperial.[38]

Czech Republic

[edit]
1956–1962 Tatra T603 engine

The 1934–1938 Tatra 77 rear-engined sedan was initially powered by 3.0 L (183 cu in) petrol V8, which was air-cooled and used an overhead camshaft that operated the valves using a 'walking beam' rocker arrangement. This model line continued until 1999 when the Tatra 700 ended production.

Tatra also produced diesel V8 truck engines from the 1939 Tatra 81 to the present day Tatra 815.

France

[edit]

French manufacturers were pioneering in their use of V8 engines in the early 1900s with the 1904 Antoinette aircraft engine (the first known V8 engine) and the 1910 De Dion-Bouton. However, there were few French automotive V8 engines in the following decades, with manufacturers such as Delage, Delahaye, Talbot-Lago, Bugatti, and Hotchkiss using six-cylinder or straight-eight engines instead.

From 1935 until 1954, Matford (Ford's French subsidiary, later renamed to 'Ford SAF') produced cars with V8 engines, closely based on contemporary American Ford models. Simca purchased the Ford SAF in 1954 and continued to produce various models powered by the Ford Flathead V8 until 1969.[39]

After WW2, France imposed very steep tax horsepower charges - the owners of cars with engines above 2 L were financially penalized, so France had a small domestic market for larger-engined cars, such as the V8.[40] Despite this, Facel Vega produced luxury and sports cars powered by Chrysler V8 engines from 1954 through 1964.[40]

Germany

[edit]
2006–2015 Mercedes-Benz M156 engine

One of the first German V8 engines was the 1928–1945 Argus As 10 aircraft engine. This engine was air-cooled, used an 'inverted V' design, and was used in several training, surveillance, and communications airplanes.

From 1933 until 1940, the Horch 830 luxury cars were powered by V8 engines (sold alongside Horch's larger straight-eight engines). Shortly after, the 1934–1937 Stoewer Greif V8 was powered by a 2.5 L (153 cu in) V8 engine.

BMW's first V8 engine was the 1954–1965 BMW OHV V8 engine, a petrol engine with overhead valves and all-aluminum construction. The company resumed production of V8 engines in 1992 with the BMW M60 aluminum double overhead camshaft engine, and V8 engines have remained in production until today. BMW's first turbocharged V8 engine was the 1998–2009 M67 twin-turbocharged diesel engine. The first turbocharged V8 petrol engine from BMW was the 2008–present BMW N63 engine.

Their[clarification needed] first eight-cylinder engine since passenger car and motorsport straight-eight engine production stopped in 1944 and 1955 respectively, Mercedes-Benz began production of the Mercedes-Benz M100 petrol V8 engine in 1963 and has continued production of V8 engines to the present day. The M100 had a single overhead camshaft, a cast-iron block, and an aluminium head. Supercharging was first used on the Mercedes-Benz M113 engine in 2002 and turbocharging was first used on non-commercial diesel V8 engines in 1999 with the OM628 and on petrol engines with the M278 engine in 2010.

Porsche's first road car to use a V8 engine was the 1978 Porsche 928 coupe. Its first to use a V8 diesel engine was the second-generation Cayenne S Diesel in 2014.

Audi's first road car to use a V8 engine was the 1988 Audi V8 luxury sedan. Its first model to use a V8 diesel engine was the D2 A8 3.3 TDI in 2000.

Italy

[edit]
Alfa Romeo
[edit]

The first V8-engined Alfa Romeo road car was the 1967–1969 Alfa Romeo 33 Stradale mid-engined sports car, of which 18 were produced. This was followed by the 1970–1977 Alfa Romeo Montreal front-engined sports car. The engines for both cars are based on the 90-degree V8 engine from the Alfa Romeo Tipo 33 racing car, and have double overhead camshafts and a dry sump. The 33 Stradale engine has a displacement of 2.00 L (122 cu in) and a flat-plane crankshaft, while the Montreal uses an engine enlarged to 2.6 L (160 cu in) and uses a cross-plane crankshaft.[41]

The 2007–2010 Alfa Romeo 8C Competizione / Spider sports cars are powered by a 4.7 L (290 cu in) version of the Ferrari F136 engine with a cross-plane crankshaft.

Ferrari
[edit]
2004–2009 Ferrari F430 engine

Ferrari's first contact with V8 engines was the Vittorio Jano-designed 1955 Lancia-Ferrari D50, a Formula One racing car that the company acquired as part of its purchase of Lancia's Formula One racing department. The first Ferrari-developed V8 engines were used in the 1962 Ferrari 248 SP and Ferrari 268 SP sports prototype racing cars designed by Carlo Chiti. This engine had a single overhead camshaft and was rear-mounted in the vehicles.

The company's first V8 road car was the 1973–1974 Dino 308 GT4 mid-engined sports car. The engine is a 90-degree all-aluminum V8 with double overhead camshafts.[42] In 1975, the 2.0 L (122 cu in) engine in the Ferrari 208 GT4 became the smallest production V8 engine ever produced.[citation needed] The model lineage of mid-engined V8 road cars continues to the 2019–present Ferrari F8 Tributo.

Five-valve-per-cylinder versions were used from 1994 until 2005 in the Ferrari F355 and Ferrari 360. Turbocharging was introduced on the 1984–1987 Ferrari 288 GTO flagship car, and the range of entry-level mid-engined sports cars switched to turbocharging with the 2015 Ferrari 488.

The Formula One team resumed using V8 engines for the 2006–2013 seasons, beginning with the Ferrari 248 F1.

Maserati
[edit]
1956–1958 Maserati 450S engine

The first Maserati V8 road car was the 1959–1965 Maserati 5000 GT luxury coupe, of which only 34 cars were produced. The 5000 GT used a 4.9 L (299 cu in) overhead camshaft engine derived from the Maserati 450S racing car. Developments of this engine were used in the 1963–1969 Maserati Quattroporte I luxury sedan, the 1967–1973 Maserati Ghibli, the 1971–1978 Maserati Bora 2-seat coupe, and several other models.

The 1990–1996 Maserati Shamal 2+2 coupe introduced a 3.2 L (195 cu in) turbocharged V8 engine based on the existing Maserati Biturbo V6. This engine was later replaced by the naturally aspirated 4.2 L (256 cu in) Ferrari F136 V8 engine, beginning with the 2001 Maserati Coupé / Spyder.

Other Italian manufacturers
[edit]

During the 1920s and 1930s, Lancia produced a line of range-topping luxury cars powered by V8 engines: the 1922–1925 Lancia Trikappa, the 1928–1935 Lancia Dilambda, and the 1931–1939 Lancia Astura. The engines ranged in displacement from 2.6–4.6 L (159–281 cu in) and used unusually narrow V-angles of 14 to 24 degrees with a single overhead camshaft. In the 1980s, an engine derived from Ferrari's V8 engine was transverse-mounted in the Lancia Thema 8.32.

The only Fiat car to use a V8 engine was the Fiat 8V, of which approximately 100 were produced 1952–1954. The 2.0 L (122 cu in) pushrod engine used an all-aluminium construction and an unusual V-angle of 70 degrees.[43] Fiat also began production of V8 diesel truck engines for the 1975 Des-8280,[44] initially in the naturally aspirated form before switching to turbocharging in the mid-1980s.

Lamborghini's V8 powered models are the 1972–1979 Lamborghini Urraco 2+2 coupe, 1976–1979 Lamborghini Silhouette 2-seat convertible, and 1981–1988 Lamborghini Jalpa 2-seat convertible. The 2018–present Lamborghini Urus SUV uses a Volkswagen Group turbocharged V8 engine.

Japan

[edit]
2008 Nissan VK50VE engine
1989 Toyota 1UZ-FE engine

Japanese manufacturers have not been significant producers of V8 engines for passenger cars due to Japanese government road tax regulations that impose higher charges for engines that exceed 2.0 L (122 cu in). However, several passenger cars have been produced with V8 engines for consumers and for use in motor racing.

Honda
[edit]

Honda has never produced V8 engines for passenger vehicles, although they did experiment with a CVCC V8 sportscar project until it was cancelled as a result of the 1973 Fuel Crisis.[45][46] In the late 1990s, the company resisted considerable pressure from its American dealers for a V8 engine, with American Honda reportedly sending one dealer a shipment of "V8" vegetable juice to silence them.[47] The only Honda car sold with a V8 engine was the 1993–1998 Honda Crossroad SUV, which was a rebadged Land Rover Discovery Series I fitted with the Rover V8 engine.

In motor racing, the Honda Indy V8 was produced for the 2003–2011 IndyCar racing series and was the control engine for the 2006 through 2011 seasons. The engine was a 3.0–3.5 L (183–214 cu in) all-aluminium V8 with double-overhead camshafts, with a power output of 650 hp (485 kW; 659 PS) and a 10,500 rpm redline.[48] The 2006–2008 Honda Racing F1 Team used 2.4 L V8 engines, which produced around 560–580 kW (750–775 hp) at 19,000 rpm, as mandated by Formula One regulations.[49]

Mitsubishi
[edit]

From 1999 to 2000, Mitsubishi briefly sold the Mitsubishi 8A8 engine, which was a 4.5 L (275 cu in) all-aluminium V8 engine with double overhead camshafts and direct injection. The engine was fitted to the Mitsubishi Proudia luxury sedan and Mitsubishi Dignity limousine; however, financial pressures forced the company to discontinue sales of both these vehicles after only fifteen months.[50]

Nissan
[edit]

The 1965–1989 Nissan Y engine is Nissan's first V8 engine, which uses a pushrod design and had a displacement of 4.0 L (244 cu in). Its primary use was in the Nissan President limousine. The Y engine was replaced by the 1989–2001 Nissan VH engine, which is an all-aluminum construction with double overhead camshafts and displacements of 4.1–4.5 L (250–275 cu in). This was replaced by the Nissan VK engine in 2002, which remains in production today. The VK engine is an all-aluminium construction with double overhead camshafts and displacements of 4.5–5.6 L (275–342 cu in).

Toyota
[edit]

The first mass-produced Japanese V8 engine was the Toyota V engine, introduced in the 1964 Toyota Crown Eight luxury car. The Toyota V engine was an all-aluminum construction, used a pushrod valvetrain, and was produced until 1997. The Toyota UZ engine has double overhead camshafts and was made from 1989 until 2013, while the Toyota UR engine added direct injection and has been in production since 2006.

From 2006 to 2009, the Toyota Racing Formula One team cars were powered by 2.4 L (146 cu in) naturally-aspirated V8 engines, as mandated by the Formula One rules. These Toyota engines were rated to produce 559 kW (750 hp) at 19,000 rpm (552 kW (740 hp) at 18,000 rpm for 2009) and were also used by the Williams, Midland, and Jordan teams.[51]

Korea

[edit]

Hyundai's first passenger car V8 engine was the 1999–2009 Hyundai Omega engine, which was based on the Mitsubishi 8A8 engine (see above). The Omega engine was replaced by the Hyundai Tau engine, which is an all-aluminium construction with double overhead camshafts and has been produced from 2008 to the present.

Sweden

[edit]

Volvo developed the B36 V8 engine in 1952, which was intended to be used in the planned Volvo Philip car. The project was canceled, but the engine has been used in trucks since 1956.[52]

In partnership with Yamaha Motor Company, Volvo developed the 4.4 litre Volvo B8444S engine. It was offered in the Volvo XC90 starting in 2005 and the Volvo S80 starting in 2006. When Ford Motor Company sold Volvo Cars to Geely Holding Group, the use of the engine was discontinued in favour of one line of i4 engines for all its models.[citation needed]

Koenigsegg initially used twin-supercharged versions of the Ford Modular V8 engine in its 2002–2004 Koenigsegg CC8S and 2004–2006 Koenigsegg CCR. The company switched to a new twin-supercharged engine they developed for the 2006–2010 Koenigsegg CCX. An updated version of their own V8 was introduced in the 2011 Koenigsegg Agera and has been used on all models since then.[53][54]

Soviet Union and Russian Federation

[edit]
1992 GAZ-24-34 Volga engine

The 1958–1967 ZIL-111 limousine was among the first Soviet cars powered by a V8 engine. The engine was an all-aluminium construction with a pushrod valvetrain. Production of ZIL limousines powered by V8 engines continued until the ZIL-41047 was discontinued in 2002.

The 1959–1988 GAZ Chaika was powered by a 5.5 L (336 cu in) V8 engine with an all-aluminium construction and a pushrod valvetrain. This engine was also used in several limited-edition models for the KGB.

Diesel engines of the V8 configuration are currently produced by the Yaroslavl Motor Plant, KamAZ. Sollers produces petrol engines for Aurus cars.

United Kingdom

[edit]
Aston Martin
[edit]

The 1969–1972 Aston Martin DBS V8 coupe/convertible was Aston Martin's first V8 model. This engine was an all-aluminium construction with double overhead camshafts and was used in several models until 2000, when the Virage model was discontinued.

Production of V8-engined Aston Martin cars resumed in 2005 with a new generation of the Vantage, powered by the Jaguar AJ-V8 naturally aspirated V8 engine.[55][56][57][58] Since 2016, Aston Martin has switched to the Mercedes-Benz M177 turbocharged V8 engine, beginning with the DB11 model.[59][60]

McLaren
[edit]

Every McLaren road car since the brand's 2010 relaunch has been powered by the McLaren M838T twin-turbocharged V8 engine, which was introduced in the McLaren 12C (then called the 'MP4-12C') coupe. This engine is an all-aluminium construction with double overhead camshafts and a flat-plane crankshaft.

Rolls-Royce
[edit]
Mid-2000s Rolls-Royce–Bentley L-series V8 engine

The first V8 engine produced in the United Kingdom was fitted to the 1905 Rolls-Royce, of which three cars were made. This engine used a side valve design, a V-angle of 90 degrees, and had a displacement of 3.5 L (214 cu in).

Mass-production of V8 engines began in 1959 with the release of the Rolls-Royce–Bentley L-series V8 engine in the Rolls-Royce Silver Cloud II, the Rolls-Royce Phantom IV, and the Bentley S2. This engine is an all-aluminium construction with a pushrod valvetrain and a V-angle of 90 degrees. It has been produced in displacements of 5.2–7.4 L (317–452 cu in), with a twin-turbocharged version introduced in 1985. The L-series V8 engine remains in production in the Bentley Mulsanne luxury sedan.[61][62]

Rover
[edit]

Rover began production of automotive V8 engines in 1967 with the Rover V8 engine. This engine used the design and tooling of the Buick V8 engine purchased from General Motors.[63] The Rover V8 is an all-aluminium construction with a pushrod valvetrain, displacements of 4–5 L (215–305 cu in) and a V-angle of 90 degrees. Rover, Land Rover, and MG used it in various automobiles.

Production continued until 2006, when it was largely replaced by the Jaguar AJ-V8 engine.

Other U.K. manufacturers
[edit]

The Daimler V8 engine was introduced in the 1959 Daimler SP250 sports car and was produced until 1969. This engine has an iron block, an alloy cylinder head, and a pushrod drivetrain that was built in displacements of 2.5–4.5 L (153–275 cu in).

The Jaguar AJ-V8 engine— Jaguar's first V8 engine for road cars— has been in production since 1996. This engine is an all-aluminium construction with double overhead camshafts. It has been produced in both naturally aspirated and supercharged configurations.

Land Rovers have used a variety of V8 engines since 1970 in Discovery and Range Rover marques. For petrol engines, they featured the Rover V8 engine from 1970 to 2004, the BMW M62 from 2002 to 2005 in Range Rover only, the Jaguar AJ-V8 engine (in both naturally aspirated and supercharged versions) from 2005 to now, and the BMW N63 and S63 twin-turbo V8s starting in 2022. For diesel engines, they used the Ford AJD-V6/PSA DT17 (3.6 TDV8) from 2006 to 2009, and have continued with the Ford 4.4 Turbo Diesel (TDV8/SDV8) from 2010 to 2022.

The 1970–1977 Triumph V8 was used solely for the Triumph Stag coupe. This engine had a cast-iron block, an aluminium cylinder head, single overhead camshafts, and a displacement of 3.0 L (183 cu in).

The 1996–2003 TVR Speed Eight engine was used in the Cerbera road cars and the Tuscan Challenge racing cars. This engine had an all-aluminium construction, single overhead camshafts, a flat-plane crankshaft, and an unusual V-angle of 75 degrees.

United States

[edit]
1917–1918 Chevrolet Series D engine
1952–1954 De Soto Fire Dome engine
1965–1967 Ford 289 HiPo engine
2006 Chevrolet LS4 engine

The first automotive V8 engine to reach production was the 1914–1935 Cadillac L-Head engine introduced in the Type 51 model.[64] The L-head had an alloy crankcase, a single iron casting for each cylinder block and head, side valves, a flat-plane crankshaft and a displacement of 5.1 L (314 cu in).[65] An electric starter motor was used, eliminating the large engines being difficult to start with hand-cranking.

The Cadillac engine was followed by a V8 model from Peerless (using an engine manufactured by an amusement park manufacturer) in 1915.[66][67]

The first American V8 production engine with overhead valves (a 'pushrod' engine) was used by the 1917 Chevrolet Series D. This engine used a counterweighted crankshaft, a detachable crossflow cylinder head, and had a displacement of 4.7 L (288 cu in).[68] Production of the Series D models ended in 1918.

The 1924 Cadillac Type V-63 was powered by the first American V8 to use a cross-plane crankshaft, which reduced vibrations.[69] A year later, Peerless also introduced a cross-plane crankshaft V8. Other manufacturers producing V8 engines by the mid-1920s included Lincoln, Ferro, Northway (supplier to Cadillac), Cole (Indianapolis and Mississippi), Perkins (Detroit), Murray, Vernon, and Yale.[70]

A significant development in providing V8 engines in more affordable cars was the 1932 through 1954 Ford Flathead V8. The Flathead V8 reduced production costs by using a monobloc (or "en bloc") construction, where each cylinder bank is made from a single piece of cast metal. The engine was fitted to the low-cost Ford Model 18 car, offering superior performance to its competitors.[71]

Demand for larger cars increased in the years following World War II, and the wider bodies were well suited to the fitment of V8 engines. This led to many manufacturers introducing overhead valve V8 engines, such as the 1949–1964 Oldsmobile Rocket engine, the 1949–1962 Cadillac 331 engine, the 1951–1958 Chrysler Firepower engine, the Studebaker's 1952 V8 engine, the 1953–1966 Buick Nailhead engine, the 1954–2002 Chevrolet small-block engine, the 1954–1963 Lincoln Y-block V8 engine, the 1955–1981 Pontiac V8 engine, and the 1956–1967 AMC Rambler engine.[72][73]

Engine displacements grew with the expanding size of full-size cars through the 1950s to mid-1970s. This led to 'big-block' engines such as:

Big-block engines reached their zenith with the 8.2 L (500 cu in) Cadillac 500 engine used in the 1970 Cadillac Eldorado coupe. During the 1970s, due to the oil crises and the gradual tightening of emission standards, big-block V8s were affected,. As a result, their use in passenger cars decreased as manufacturers began to phase them out for more efficient designs.

Before the late 1970s, sharing engines between General Motors' divisions was uncommon. This enabled each division to have its unique engine character but made for much duplication of effort. The company has since implemented the sharing of engines across divisions; however, some divisions (such as Cadillac) still maintain some engines specific to their division. Ford and Chrysler had fewer divisions and favored brand-specific shared designs.

In 2011, GM built its 100-millionth unit of the Chevrolet small-block engine, making that engine family the most produced V8 engine in the world.[74]

American manufacturers continue to produce large displacement V8 engines, despite the strategy of downsizing engines (often in conjunction with turbocharging) being adopted by many European and Asian manufacturers.[75][76][77][78] These engines continued to use pushrod (overhead valve) valvetrains long after most overseas engines had switched to dual overhead camshaft designs. Examples include the 6.4 L (392 cu in) Chrysler Apache engine produced from 2011–present, the 7.3 L (445 cu in) Ford Godzilla engine produced from 2020–present,[79][80][81][82] and the 6.6 L (401 cu in) GM L8T engine produced from 2020–present.[83][84][85][86][87]

American manufacturers have concurrently produced more modern DOHC engines, such as the Chevrolet Gemini small-block engine, Cadillac's turbocharged Cadillac Blackwing V8,[88][89] and the Ford Modular V8.

Vietnam

[edit]

In Vietnam, VinFast used a V8 engine in the full-size SUV VinFast President from December 2020.[90]

Airplane use

[edit]
Wolseley 120 hp aircraft engine, c. 1910

Several early aircraft engines used a V8 configuration, such as the French 1904 Antoinette engine and 1906 Buchet engines. The 1905 version of the Antoinette engine produced 37 kW (50 hp) with 86 kg (190 lb) of weight (including cooling water), resulting in a power-to-weight ratio that was not surpassed for 25 years.[91]

Early airplanes continued to use V8 engines. During World War One, V8 aircraft engines included the French Renault 8G, the Spanish Hispano-Suiza 8, the British Sunbeam Arab, and the American Curtiss OX-5.

The 1915 Hispano-Suiza 8 SOHC engine was designed by Marc Birkigt from Switzerland and was built by Hispano-Suiza in France and Spain as well as under license in England and the United States.[92] This engine was used by American, French, and British military aircraft in World War One. It was one of the most important engines with most of the leading aces piloting aircraft powered by this dependable, flexible-performance, as well as light and well-balanced Hispano-Suiza 8 engine.[93] By 1922, the versions incorporated improvements by Wright Aeronautical and was considered the lightest and most efficient pursuit engine in the world.[92]

After this time, flat-eight engines became more commonplace than V8 engines due to their lighter crankshafts and better suitability for air cooling. One of the few remaining V8 airplane engines by World War Two was the German Argus As 10 inverted V8, which was air-cooled and used in several trainers and small utility aircraft.[94]

Marine vessel use

[edit]
Scania AB marine/truck engine
360 cu in (5.9 L) AMC V8 with tow ring for water skiing

The V8 configuration is not commonly used in marine vessels. Nevertheless, the arrangement provides for a short engine that is also well-balanced for high-speed work.[95] In addition to gasoline fuel, several marine diesel V8 engines have been produced by companies such as Brons, Scania, and Yanmar.

Gray Marine Motor Company was one of the first to use petrol V8 engines for marine use.[96] Engines from American Motors Corporation (AMC) were utilized by Gray Marine from 1957 until 1968. They were marketed as "Fireball" inboards and available in 4.1, 4.7, and 5.4 L (250, 287, and 327 cu in) versions.[97] They used a variety of carburetor combinations, including single and dual Carter one barrel YH side-drafts, Carter two-barrel, and Carter AFB/AVS four-barrel types.[98] The engine is mostly the same as for automobile applications, with changes to freeze plugs and cam profiles (to reduce top rpm), and well as positive displacement pump to cool each cylinder bank separately and evenly. Reverse rotation allowed for use in twin-engine boats.[98] The "Fireball" engines often powered Century motor yachts and many Lyman boats. In the 1970s, AMC's 5.9, 6.4, and 6.6 L (360, 390, and 401 cu in) V8 engines were also available as marine versions, with most fitted to jet drive boats for water skiing.[99]

Wärtsilä 31, a four-stroke medium-speed diesel engine manufactured by Wärtsilä, is one of the few large marine diesel engines available in V8 configuration.[100] The 8V31 model, which has a cylinder bore of 31 centimetres (12 in), is available as diesel (8V31), dual-fuel (8V31DF), and pure gas (8V31SG) configurations with an output of 4,400 to 4,880 kilowatts (5,900 to 6,540 hp) depending on the model.[101][102][103]

Motorcycle use

[edit]

Until Boss Hoss Cycles began production in 1990, the few V8 motorcycles made were either prototypes or racing machines.

In 1907, Glen Curtiss set an unofficial world record of 136.36 mph (219.45 km/h) on a home-made 4.0 L (244 cu in) motorcycle.[104] The Moto Guzzi V8 was a 499 cc (30.5 cu in) motorcycle capable of 275 km/h (171 mph)[105] used for Grand Prix racing from 1955 until 1957.[106] The 1994 Morbidelli V8 was an 848 cc (51.7 cu in) concept motorcycle which did not reach production. As of 2006, Boss Hoss had sold over 4,000 bikes and trikes with Chevrolet V8 car engines.[107]

See also

[edit]

References

[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia
from Grokipedia
A is an with eight s arranged in two banks of four, positioned in a V-shaped configuration around a common , enabling efficient power delivery through a four-stroke cycle of , compression, power, and exhaust. This design typically features a 90-degree between the cylinder banks for optimal balance and compactness, often employing a cross-plane to minimize vibrations and ensure smooth operation. The V8 configuration originated with a 1902 patent by French engineer Léon Levavasseur, initially applied in aircraft and marine applications before transitioning to automobiles. produced the first automotive V8 in 1915 with its Type 51 model, a 90-degree L-head design that marked a milestone in luxury vehicle performance. Henry Ford's 1932 flathead V8, cast in a single iron block for affordability and reliability, generated 65-90 horsepower and propelled the V8 to speeds over 80 mph, democratizing high-performance motoring and influencing techniques. V8 engines dominated the American automotive landscape from the 1930s through the 1970s, powering iconic muscle cars like the and , as well as trucks and SUVs, due to their superior , distinctive exhaust note, and ability to deliver rapid acceleration. By the mid-1950s, innovations such as Chevrolet's small-block V8—of which over 113 million have been produced as of 2024—further solidified their role in performance and economy vehicles. In response to the 1970s oil crisis and emissions regulations, V8 designs evolved with features like cylinder deactivation and electronic , maintaining relevance in modern applications including high-performance hybrids. Today, V8s remain prevalent in luxury sedans, sports cars, and heavy-duty trucks, symbolizing engineering prowess and cultural significance in motorsports like .

History

Early development

The V8 engine configuration was first practically realized by French engineer Léon Levavasseur in 1904, who designed it for the Société Antoinette primarily for high-speed applications. Initially powering racing speedboats that dominated European competitions, the design was swiftly adapted for aviation, equipping early Antoinette monoplanes such as the Antoinette IV. The Antoinette 8V featured a 90-degree V arrangement with liquid (, an 8-liter displacement, and output of 50 horsepower at 1,100 rpm, enabling reliable propulsion in the nascent field of powered flight. Building on this foundation, early 20th-century patents and experiments sought to refine the V8 for diverse uses, emphasizing innovations and structural efficiency. In early , the V8 configuration marked a pivotal shift from emerging radial designs, tackling persistent issues with and cooling in high-power setups. Radial engines, exemplified by Alessandro Anzani's static radial, offered inherent air-cooling via their circular layout but struggled with uneven to rear cylinders and increased drag from their broad profile. The V8's narrower banks facilitated superior integration into slender fuselages, enhancing aerodynamic while enabling efficient water-cooling systems that maintained consistent temperatures without relying solely on propwash, though radiators added weight and maintenance demands. The V8 entered automotive production in with the French De Dion-Bouton's Type CJ, the first series-built example for passenger vehicles, featuring a 6.1-liter displacement and 35 horsepower from its side-valve design. This engine powered luxury touring cars, bridging aviation prototypes to road use by delivering smooth torque in a compact package suitable for early . In the United States, the Buffum Runabout offered an early domestic V8 variant from to , with a 45-degree 6.6-liter unit producing 40 horsepower, underscoring the configuration's growing viability for personal transport.

Key milestones and innovations

The , introduced in 1914 as a 1915 model, featured the first mass-produced automotive V8 engine, an L-head design with 314 cubic inches of displacement producing 70 horsepower. This innovation allowed to offer superior power and smoothness in luxury vehicles, with approximately 13,000 units sold in its debut year, solidifying the brand's reputation as a pioneer in high-end performance motoring. In 1932, Ford revolutionized accessible performance by introducing the Flathead V8, the first affordable mass-produced V8 engine for the average consumer, delivering 65 horsepower through a simple, lightweight flat design that minimized manufacturing costs. This engine's production techniques, leveraging Ford's efficiencies, enabled widespread adoption in models like the Model 18, while its modifiability fostered the hot-rodding culture, influencing early and stock car competitions. Post-World War II advancements shifted toward overhead-valve (OHV) designs for greater efficiency and power, exemplified by Oldsmobile's 1949 Rocket V8, a 303-cubic-inch engine rated at 135 horsepower with a 7.25:1 and short-stroke configuration. Paired with the Hydra-Matic automatic transmission, this OHV V8 propelled the to dominance in early events, winning 5 of the 8 NASCAR Strictly Stock races in 1949 and launching an industry-wide transition from flathead engines by the mid-1950s. The 1960s marked the peak of the muscle car era, with Pontiac's 389-cubic-inch V8 powering icons like the 1964 GTO, where the Tri-Power version delivered up to 348 horsepower, emphasizing wide-track handling derived from programs. Similarly, Chevrolet's 427-cubic-inch big-block V8, introduced in 1966, offered 390 horsepower in the and up to 425 in high-performance variants, drawing from and developments to influence street-legal powertrains. These engines exemplified the era's focus on raw output, blending over-the-counter parts with consumer applications. Stricter emissions regulations under the 1970 Clean Air Act prompted downsizing in the 1970s to meet fuel economy and pollution standards, leading to smaller V8s like Ford's 5.0-liter (302-cubic-inch) engine in , which became the base V8 option by with reduced compression and power around 140 horsepower to comply with catalytic converters and unleaded fuel requirements. This shift curtailed the big-block dominance of prior decades, prioritizing efficiency over unbridled performance.

Design and configuration

V arrangement and firing order

The V8 engine features eight cylinders arranged in two banks of four, forming a V-shaped configuration that shares a common , allowing for a compact compared to an inline-eight layout. This positions the cylinder banks at a specific angle to each other, known as the V-angle, which influences the engine's overall balance and smoothness. The most common V-angle for V8 engines is 90 degrees, which provides optimal mechanical balance by aligning the reciprocating forces of the pistons and the firing impulses to cancel out effectively. At this angle, the engine behaves as if composed of four balanced V2 units, distributing rotational, reciprocating, and gas forces evenly across the rotations. A 90-degree V8 achieves primary balance without additional counterweights for these forces, resulting in smoother operation. Variations in V-angle exist to prioritize or constraints, such as the 60-degree layout used in the Yamaha-designed B8444S V8 engine. This narrower angle reduces the engine's width, making it suitable for tighter engine bays in vehicles like the , but it introduces uneven firing intervals and higher vibration levels compared to the 90-degree setup, often necessitating balance shafts or other damping measures to mitigate secondary vibrations. The in a typical V8 engine follows 1-8-4-3-6-5-7-2 (viewed from the front, with cylinders numbered odds 1-3-5-7 front to rear on the left/driver's side bank and evens 2-4-6-8 on the right/passenger side bank), enabling even firing intervals of 90 degrees of rotation over two full revolutions (720 degrees). This pattern provides balanced pulses across the banks to minimize torsional vibrations and ensure consistent power delivery. The sequence can be visualized as:
  • 0°: Cylinder 1 fires (left bank)
  • 90°: Cylinder 8 fires (right bank)
  • 180°: Cylinder 4 fires (right bank)
  • 270°: Cylinder 3 fires (left bank)
  • 360°: Cylinder 6 fires (right bank)
  • 450°: Cylinder 5 fires (left bank)
  • 540°: Cylinder 7 fires (left bank)
  • 630°: Cylinder 2 fires (right bank)
This even distribution integrates with the crankshaft's geometry for balanced operation. To optimize space and reduce mechanical interference, V8 engines often incorporate a slight axial offset between the cylinder banks along the crankshaft axis, such as the right bank positioned marginally forward of the left in Ford's flathead V8 designs. This offset, combined with angled connecting rods that converge toward shared crankpins, minimizes contact between rods from opposing banks during operation, particularly at the inner cylinders where angularity is greatest. Such adjustments ensure clearance without compromising the V-angle's balance properties.

Crankshaft and balance types

The in a V8 engine serves as the central component linking the pistons to rotational output, with its design significantly influencing , vibration levels, and characteristics. In a 90° V8 configuration, two primary crankshaft types are employed: cross-plane and flat-plane, each optimized for different priorities in smoothness and revving capability. The cross-plane features crank pins offset at 90° intervals, aligning with the 90° V-angle to achieve inherent primary and secondary balance. This arrangement cancels out most reciprocating forces naturally, minimizing vibrations and providing smooth operation across a wide RPM range. Counterweights on the further refine this balance by offsetting rotational , though they add that can limit maximum engine speed. American V8 engines, such as ' LS series small-block, typically use this design for its torque-rich delivery and low-end refinement. In contrast, the flat-plane positions all crank pins in a single plane, with 180° offsets between throws, resembling an extended inline-four design. This configuration allows for lighter overall crankshaft mass due to reduced needs, enabling higher revving and more even exhaust pulses for improved breathing at peak speeds. However, it introduces unbalanced secondary forces, leading to characteristic rocking vibrations and higher-order harmonics that can affect refinement. Flat-plane crankshafts are prevalent in high-performance European sports car V8s, such as those from Ferrari, where the trade-offs are accepted for responsive power delivery. To address residual imbalances, particularly in flat-plane designs, supplementary solutions like balance shafts and additional counterweights have been adopted since the for enhanced smoothness. Balance shafts, rotating in opposition to the , counteract secondary vibrations by generating equal and opposite forces, though they introduce parasitic losses. In cross-plane V8s, such measures are less critical due to the inherent balance, but they may still be used for ultra-refined applications. Comparatively, cross-plane crankshafts exhibit lower rotational from their balanced layout, promoting stable but constraining rev limits due to heavier components, while flat-plane designs reduce for quicker yet amplify secondary forces, resulting in more pronounced engine harmonics like fourth-order vibrations. These differences stem from how each type integrates with the V8's 90° angle, where cross-plane achieves near-perfect force cancellation and flat-plane prioritizes dynamic response over static smoothness.

Displacement and variants

V8 engines are categorized by displacement into small-block and big-block variants based on , with small-blocks generally ranging from 4.0 to 6.6 liters (up to 7.0 liters in some families like GM's ) and big-blocks typically larger, exceeding 6.0 liters up to 9.0 liters or more. Small-block designs prioritize compactness and versatility for passenger vehicles, exemplified by Ford's 5.0-liter V8, which features a 93 mm bore and 92.7 mm in a DOHC configuration. In contrast, big-block V8s emphasize high torque for heavy-duty applications, such as Ford's 7.3-liter Godzilla engine, a pushrod OHV unit with a 107 mm bore and 99 mm delivering up to 430 horsepower. Layout variants of V8 engines include traditional pushrod overhead valve (OHV) designs, which use a single camshaft in the block for simpler construction and lower costs, as seen in General Motors' LS-series small-blocks. Overhead cam (OHC) configurations, including single (SOHC) and dual (DOHC) variants, enable higher rev limits and better airflow through four valves per cylinder, like the DOHC setup in the Ford Coyote. Forced-induction setups further diversify layouts, with superchargers providing immediate low-end torque in engines such as GM's 6.2-liter LT4, which integrates a 1.7-liter Eaton supercharger atop its DOHC heads. Turbocharged V8s, often paired with intercoolers, enhance efficiency in high-output applications, though they are more prevalent in diesel variants. While most V8s operate on , diesel configurations exist for superior and in trucks, such as Ford's 6.7-liter Power Stroke V8 , which produces 475 horsepower and 1,050 lb-ft of (standard output as of 2025) through an OHV layout with common-rail injection. Adaptations for alternative fuels include flex-fuel capabilities for blends up to , allowing seamless operation between and high- mixes in engines like GM's Vortec V8s, which feature adjusted injectors and engine to 's higher and corrosiveness. Modular designs enhance scalability across V8 families, enabling shared components like blocks, heads, and electronics for cost-effective production of multiple displacements. ' Gen III and IV small-block family, starting with the 4.8-liter LR4 and extending to the 7.0-liter LS7, uses a common with interchangeable bore sizes and stroke lengths to span applications from light trucks to performance cars.

Performance characteristics

Advantages and disadvantages

The V8 configuration excels in delivering high and , primarily due to its large displacement and eight-cylinder arrangement, which allows for substantial output suitable for demanding applications. This design provides exceptional power output, enabling strong and high capacity that enhances the driving experience in high-performance vehicles. Additionally, the V8's inherent balance, particularly with a cross-plane , contributes to smooth operation by minimizing vibrations and providing better low-end , resulting in refined behavior. The configuration's cultural appeal persists among enthusiasts, as it remains a preferred for muscle and sports vehicles due to its iconic sound and dynamic characteristics. Despite these strengths, V8 engines suffer from poor stemming from their larger size and greater number of cylinders, which demand more fuel to operate compared to smaller configurations. They also produce higher emissions as a byproduct of their scale, exacerbating environmental concerns in larger-displacement setups. Packaging presents further challenges, as the V8's wide profile and length can complicate integration into compact designs, limiting its suitability for smaller . In comparison to inline-6 or V6 engines, the V8 offers superior power from its additional cylinders but at the cost of increased complexity in components like the and exhaust systems, along with greater overall weight that can affect vehicle balance. This means V8s provide more horsepower and for heavy-duty tasks but introduce higher and operational intricacies than the smoother, lighter inline-6 or more efficient V6 alternatives. Regarding maintenance, V8 engines with blocks offer enhanced durability and the ability to withstand higher temperatures and stresses, making them robust for long-term use, though they add significant weight. In contrast, aluminum blocks reduce overall engine lightness, improving power-to-weight ratios and handling, but may require more careful thermal management to maintain structural integrity.

Efficiency and emissions

V8 engines, characterized by their large displacement, typically exhibit efficiencies ranging from 20% to 30% in variants, reflecting the inherent challenges of converting into mechanical work amid higher losses and pumping inefficiencies compared to smaller configurations. Advancements such as direct injection, which optimizes atomization and phasing, and (VVT), which adjusts valve overlap to reduce pumping losses and improve , have incrementally boosted these figures; for instance, modern implementations can enhance brake by up to 5-10% through better air- mixing and reduced throttling. These technologies prioritize conceptual gains in part-load operation, where V8s often spend significant time in real-world driving cycles. The emissions profile of V8 engines is marked by elevated CO2 output due to their substantial fuel consumption—often 20-50% higher per than downsized alternatives—and correspondingly high formation from elevated combustion temperatures in large cylinders. Post-1970 regulatory pressures, particularly following the U.S. Clean Air Act amendments, prompted the widespread adoption of catalytic converters starting in 1975 for all new vehicles, including V8-powered models; these three-way catalysts oxidize CO and hydrocarbons while reducing , achieving up to 90% conversion efficiency when paired with unleaded fuel. This evolution significantly curbed tailpipe pollutants, though large-displacement V8s still demand robust aftertreatment to manage their inherently higher raw emissions. Fuel economy for modern V8-equipped trucks typically falls in the 15-20 range under EPA combined-cycle testing, as seen in models like the with its 6.2L V8, which rates at 15 city/20 highway , underscoring the between displacement-driven and relative to turbocharged four- or six-cylinder options achieving 25+ . Regulatory compliance with standards such as EPA Tier 3 and Euro 6/7 has driven adaptations including (EGR) to dilute intake charge and lower peak combustion temperatures, reducing by 20-50%, alongside gasoline particulate filters (GPFs) for Euro 6 particle number limits, which capture over 80% of from direct-injection combustion. These measures enable V8s to meet stringent tailpipe and evaporative emission thresholds while maintaining drivability, though they add system complexity.

Automotive applications

Passenger and commercial vehicles

The V8 engine remains a staple in passenger cars, particularly in performance-oriented muscle cars and luxury sedans, where its smooth power delivery and distinctive exhaust note enhance the driving experience. In muscle cars like the GT, the 5.0-liter Coyote V8 produces 480 horsepower and 418 pound-feet of , enabling rapid acceleration and high-speed capability suitable for everyday road use. Similarly, luxury sedans such as the BMW 760i xDrive employ a 4.4-liter twin-turbocharged V8 that delivers 536 horsepower and 553 pound-feet of , providing refined propulsion for long-distance comfort while maintaining compatibility with advanced technologies. These applications highlight the V8's role in balancing enthusiast appeal with practical passenger transport. In commercial vehicles, V8 engines excel in heavy-duty tasks, powering pickup trucks and SUVs with robust and capacities. The Ford F-150's 5.0-liter Ti-VCT V8 offers up to 12,900 pounds of capacity when equipped with the Tow/Haul Package, making it ideal for hauling trailers or equipment in work scenarios. Likewise, the Chevrolet Tahoe's 6.2-liter EcoTec3 V8 generates 420 horsepower and 460 pound-feet of , supporting a maximum rating of 8,400 pounds and accommodating family or fleet demands in large SUVs. These configurations often utilize overhead valve (OHV) designs for durability in truck applications. V8 engines in passenger and commercial vehicles are typically mounted longitudinally to align with rear-wheel-drive or all-wheel-drive layouts, optimizing and driveshaft efficiency, though transverse mounting is rare due to the engine's width and has been adapted in select front-wheel-biased designs for compact . Longitudinal setups facilitate seamless integration with all-wheel-drive systems via centralized transfer cases, enhancing traction in varied road conditions without compromising the V8's inherent balance. Despite industry-wide engine downsizing toward turbocharged four- and six-cylinder units for better , V8 engines persist in premium segments of passenger cars and commercial vehicles, driven by consumer demand for superior and in luxury and heavy-duty markets as of 2025. This trend underscores the V8's enduring value in high-end applications where refinement and capability outweigh emissions constraints.

Motorsport and racing

In motorsport, V8 engines have been pivotal in various racing disciplines, prized for their high power output, compact layout, and ability to deliver rapid acceleration under stringent regulatory constraints. From the mid-2000s to early 2010s, utilized naturally aspirated 2.4-liter V8 engines in a 90-degree configuration, limited to 18,000 rpm speed to balance performance and reliability while transitioning toward hybrid power units in 2014. These engines, weighing a minimum of 95 kg, produced around 750-800 horsepower, emphasizing lightweight materials and flat-plane for high-revving efficiency in grand prix racing. In , NASCAR's Cup Series employs pushrod-operated 5.86-liter (358 ) V8 engines, restricted by rules to promote parity and safety. These overhead-valve designs deliver approximately 670 horsepower on most tracks, dropping to about 510 horsepower under restrictor plates at superspeedways like Daytona to mitigate extreme speeds. The engines feature a 90-degree V and dry-sump , optimized for endurance over 500-mile races with minimal modifications allowed beyond and electronic controls. Drag racing showcases the extreme potential of supercharged V8s, particularly in NHRA classes where 8.2-liter (500 cubic inch) big-block engines run on a 90% fuel blend. These heavily modified units, featuring 14:1 compression ratios and twin superchargers, generate over 11,000 horsepower at limited revs of 8,500 rpm, enabling quarter-mile elapsed times in the low 3.6-second range at speeds exceeding 340 mph. The engines' short lifespan—often rebuilt after each pass—highlights their focus on peak power bursts rather than longevity. Beyond circuit and oval racing, V8s power endurance series like Australia's , where Gen3 regulations specify naturally aspirated V8s between 5.0 and 5.7 liters, producing around 600 horsepower with a single and two valves per cylinder. In land speed attempts, piston-driven V8s hold records for wheel-driven vehicles; for instance, the twin-turbocharged big-block Chevrolet V8 in the Speed Demon streamliner achieved a two-way average of 470 mph at Bonneville in 2020, underscoring the configuration's scalability for ultra-high-velocity runs.

Regional and manufacturer-specific uses

In the United States, V8 engines have been a cornerstone of since the mid-20th century, with , Ford, and establishing dominant families that shaped the era and beyond. Chevrolet's small-block V8, introduced in 1955 as a 265-cubic-inch (4.3 L) design led by engineer , powered vehicles like the and became the basis for over 100 million units produced, offering a and versatility across displacements up to 400 cubic inches (6.6 L). Ford countered with its Windsor small-block series starting in the 1960s and big-block offerings like the 429-cubic-inch (7.0 L) engine in 1969, which delivered up to 375 horsepower in high-performance variants for models such as and Thunderbird. contributed through its Hemi and LA-series V8s, with the 426 Hemi big-block introduced in 1964 for racing-derived power exceeding 425 horsepower, cementing the V8's status as a synonymous with American automotive power and freedom. In , manufacturers have refined V8s for high-performance luxury applications, emphasizing turbocharging and . Mercedes-AMG's 4.0-liter biturbo V8, part of the M177 family, powers models like the G 63 SUV with 577 horsepower and 850 Nm of , featuring hand-built assembly in for enhanced responsiveness and a signature exhaust note. BMW's S63 4.4-liter V8, debuting in 2010 for M-division vehicles such as the F10 M5, produces up to 617 horsepower in later iterations, incorporating cross-bank exhaust routing for reduced turbo lag and superior high-revving capability up to 7,500 rpm. These engines reflect Germany's focus on integrating V8 potency with advanced electronics and all-wheel-drive systems for balanced grand touring. Japan's adoption of V8s came later, prioritizing until the 2000s, but has since produced sophisticated units for luxury and segments. Toyota's 1UR-FSE 4.6-liter V8, featuring direct injection and dual , debuted in 2006 for the 460, delivering 380 horsepower and 367 lb-ft of with a focus on smooth refinement and acoustic control via active noise cancellation. Nissan's VK56 5.6-liter V8, introduced in 2004 for the Infiniti QX56 and Armada, offers 400 horsepower, with an aluminum block and continuous for robust low-end suited to heavy-duty . These engines highlight Japan's engineering emphasis on durability and integration with hybrid systems in later models. Beyond these powerhouses, V8 development shows regional diversity, such as Australia's Holden 304-cubic-inch (5.0 L) V8, produced from 1985 to 2000 as a detuned evolution of earlier 308-cubic-inch designs, powering Commodores with 200-250 horsepower and embodying local muscle car culture through cast-iron durability for high-mileage use. In Italy, Ferrari's 4.5-liter flat-plane crankshaft V8, from the F136 family co-developed with Maserati, propelled the 458 Italia from 2009 with 562 horsepower at 9,000 rpm, enabling a 0-60 mph time under 3.5 seconds and a distinctive high-pitched exhaust symphony due to its 90-degree bank angle and lightweight internals. Emerging markets like China are exploring V8s, though adoption remains limited compared to inline-sixes. Manufacturer-specific innovations include the 3.5-liter aluminum V8, licensed from Buick's 215-cubic-inch design and introduced in 1967 for the Rover P5B sedan, weighing just 140 kg for improved handling and producing 160 horsepower with overhead valves for compact luxury applications across sports cars and off-roaders. In the , the ZMZ-503 5.5-liter V8 powered the GAZ-13 Chaika limousine from 1959, generating 195 horsepower via a cast-iron block and two-barrel , derived from engines for reliable, high-output service in state vehicles despite fuel inefficiency.

Non-automotive applications

Aviation and aircraft

The V8 engine entered in the early 1900s as one of the first multi-cylinder configurations suitable for powered flight. The pioneering 8V, designed by Léon Levavasseur and first produced in 1906, was a liquid-cooled, 90-degree V8 with a displacement of 8 liters and output of 50 horsepower at 1,400 rpm. Its inverted-V layout improved propeller ground clearance, making it ideal for seaplanes like the IV, which attempted the first Channel crossing in 1909. This engine powered early European monoplanes and contributed to aviators' experiments in sustained flight, marking the V8's transition from speedboat racing to aerial propulsion. Although V8 engines were overshadowed by V12 and radial designs in major fighters, they appeared in specialized roles. The German series, an air-cooled inverted V8 delivering up to 270 horsepower, equipped liaison and training such as the , valued for its performance in reconnaissance missions. Liquid-cooled V8 variants, drawing from pre-war automotive technology, were explored for their compact power but faced challenges in scaling for high-altitude combat. For instance, the Ford GAA, an 18 L liquid-cooled V8, was developed for but adapted for use in tanks like the M4A3 Sherman due to a shortage of radial engines. In the post-war period, embraced auto-derived V8 conversions for their affordability and power in . Builders adapted engines like the Chevrolet 350 cubic-inch (5.7 L) small-block V8, tuned to around 300 horsepower, for homebuilt conversions of classics such as the , offering reliable cruise performance at lower operating costs than certified powerplants. These modifications often included propeller reduction gearboxes to match speeds, enabling efficient operation in light utility roles. Contemporary applications in experimental UAVs and kit planes favor modern V8s for high-thrust needs in larger airframes. General Motors LS-series V8s, such as the 6.2-liter LS3 producing over 400 horsepower, power kit planes like the Velocity XL, where electronic fuel injection and lightweight aluminum construction support extended range and speed. In UAV development, converted V8s appear in heavy-lift prototypes, though certification hurdles limit widespread adoption. Supercharging these engines for altitude poses challenges, as gear-driven superchargers maintain boost only up to a critical altitude (typically 10,000-15,000 feet), beyond which power fades due to thinning air, often necessitating turbochargers for sustained high-altitude performance.

Marine and boating

V8 engines have been widely adopted in marine applications due to their balance of power, , and reliability in ranging from recreational boats to high-speed performance vessels. These engines are typically configured as four-strokes for outboard and inboard setups, with adaptations for saltwater , such as enhanced cooling systems and protective coatings. Diesel V8 variants provide high for in larger commercial boats, emphasizing and durability over raw speed. In inboard applications, the Mercury MerCruiser 8.2L V8 delivers 380 horsepower for boats, powering vessels like sport cruisers and yachts with smooth acceleration and hull integration. This engine features corrosion-resistant adaptations, including the SeaCore system with hard-coat on components and a freshwater closed-cooling circuit to minimize saltwater exposure and . These modifications extend service life in harsh marine environments, making it suitable for extended offshore use. For outboard configurations, the Yamaha F350, a 5.3L V8 four-stroke design producing 350 horsepower introduced in 2007 (discontinued in 2020), met demands for powerful propulsion in offshore fishing boats. Its large displacement and enhanced low-end torque for handling heavy loads and rough seas, while the inline multi-point ensured efficient combustion and reduced emissions. This engine's compact V8 layout allowed for twin or triple installations on larger center consoles without excessive weight penalties. In high-performance offshore racing, supercharged V8 engines like the Mercury Racing 9.0L twin-turbocharged unit generate up to 1100 horsepower per engine, propelling Class 1 boats to speeds exceeding 130 mph. These catamaran-hulled racers, often fitted with twin engines, rely on the V8's high-revving capability (up to 6500 rpm) and robust construction to withstand extreme g-forces and wave impacts during competitions governed by the American Power Boat Association. The 9.0L displacement provides the necessary band for rapid from 0 to 100 mph in under 10 seconds. Diesel V8 engines, such as the , offer around 1000 horsepower and peak of 3800 Nm at 1500 rpm for commercial vessels like ferries and workboats, prioritizing sustained and low-speed maneuverability. This 16.2L configuration uses common-rail injection and turbocharging for efficient use and compliance with emissions standards, enabling reliable operation in demanding freight or services. The V8's inline layout facilitates easy and integration with shafts in hull designs focused on stability rather than speed.

Motorcycles and powersports

V8 engines have been rarely applied to motorcycles and powersports vehicles due to their size, weight, and vibration characteristics, which pose significant challenges in , two-wheeled, or off-road platforms. These applications are typically limited to custom builds, prototypes, and niche setups where the desire for high power outweighs practical concerns like handling and frame integrity. One notable production prototype is the , developed in 1979 and raced through 1982. This Grand Prix racer featured a revolutionary 748cc four-stroke DOHC V8 engine with oval pistons to achieve high-revving performance equivalent to a multi-cylinder two-stroke, producing approximately 120 horsepower. Despite its innovative design aimed at competing against dominant two-stroke engines, the NR500 never secured a race win and was not mass-produced, primarily due to excessive weight, complexity, and reliability issues stemming from the compact V8's packaging in a motorcycle chassis. In custom motorcycles, particularly choppers, V8 engines offer immense power but introduce balance challenges in lightweight frames. Builders like V8 Choppers incorporate small-block Chevrolet V8s, often tuned to around 200 horsepower, into two-wheeled frames for dramatic acceleration and exhaust note. However, the engine's mass and inherent vibrations—exacerbated by cross-plane designs—require reinforced frames and advanced to mitigate handling instability and rider fatigue in these slim, elongated . Powersports vehicles, such as ATVs and quad bikes, occasionally feature V8 conversions for and recreational thrills. Custom examples include aluminum-bodied mini V8s around 1.0L displacement, adapted from small automotive blocks for high-revving in quad frames, enabling rapid quarter-mile runs despite limited production. Larger setups, like the Bourget's Shredder with a 6.0L LS2 V8, deliver over 400 horsepower for off-road drags but demand custom suspension to handle the . Drag racing motorcycles with V8 powerplants represent the extreme of these applications, prioritizing straight-line speed over everyday usability. Iconic examples include E.J. Potter's Widowmaker series from the , powered by Chevrolet big-block V8s up to 7.0L and supercharged for over 500 horsepower, achieving an 8.68-second quarter-mile at 172 mph in 1973—earning a as the fastest at the time. Modern nitrous-injected variants of similar 7.0L big-block setups have pushed into the low 7-second range for the quarter-mile, though such bikes remain bespoke racers due to safety and regulatory hurdles.

Modern developments

Technological advancements

In the , advancements in materials have significantly reduced the weight of V8 engines, enhancing vehicle performance and efficiency. The widespread adoption of aluminum alloy blocks and cylinder heads has become a hallmark of modern V8 design, offering substantial weight savings compared to traditional cast-iron components. For instance, the Ford 5.0L V8 features an all-aluminum block weighing approximately 114 pounds (52 kg), which is about half the weight of an equivalent iron block, contributing to improved power-to-weight ratios and better handling in applications like the . This material shift not only lowers overall engine mass—typically by 80 to 100 pounds for a V8 block—but also improves thermal dissipation, allowing for more compact packaging and reduced emissions through better heat management. Electronic controls have revolutionized V8 engine operation, enabling precise management of timing and load for optimal performance and fuel economy. Engine Control Units (ECUs) now integrate (VVT) systems, which adjust valve opening and closing dynamically based on engine speed and load, improving airflow efficiency across the RPM range. Complementing this, cylinder deactivation technologies, such as ' (AFM), seamlessly shut down four cylinders during light-load conditions, yielding fuel savings of up to 12 percent in real-world driving cycles without compromising drivability. These ECU-driven features, often paired with advanced sensors for real-time adjustments, have become standard in production V8s, balancing high output with regulatory demands for lower consumption. Forced induction techniques, particularly twin-turbocharging, have elevated V8 power densities while maintaining compact dimensions. Modern setups employ parallel or sequential turbos with efficient intercooling to minimize lag and maximize boost, delivering exceptional horsepower from moderate displacements. The 4.0L TFSI V8, for example, utilizes a configuration with air-to-water intercooling to produce 621 horsepower (457 kW) and 627 lb-ft (850 Nm) of , powering high-performance models like the RS6 Avant. This approach enhances response and , with intercoolers reducing temperatures to prevent , allowing sustained high outputs in demanding scenarios. Manufacturing innovations have further refined V8 production, accelerating development and ensuring precision. Additive manufacturing, or , is increasingly used for prototyping complex components like intake manifolds and brackets, enabling rapid iteration and . Ford, for instance, employed 3D printing on-site during the 2025 Mustang GTD's development to create lightweight, high-strength parts under race conditions, shortening lead times from months to days. Complementing this, Computer (CNC) machining delivers micron-level accuracy for critical elements like cylinder bores and crankshafts, minimizing tolerances and enhancing durability in high-revving V8s. 5-axis CNC systems, in particular, allow for intricate geometries that improve oil flow and cooling, as demonstrated in the production of aluminum V8 blocks. As the automotive industry accelerates toward to meet stringent emissions regulations and goals, V8 engines are increasingly integrated with hybrid systems rather than being phased out entirely, particularly in high-performance and heavy-duty applications where their power delivery and remain valued. This hybrid approach allows manufacturers to comply with standards like the European Union's CO2 targets while preserving the V8's performance heritage, often through mild-hybrid 48-volt systems or plug-in configurations that enhance and without fully replacing . For instance, V8 powertrains can achieve significant fuel economy improvements—up to 30% in some models—while delivering combined outputs exceeding 800 horsepower. Mercedes-AMG exemplifies this trend with its development of a next-generation electrified V8, set to debut in performance models starting in 2026. This twin-turbocharged unit, potentially building on the existing 4.0-liter architecture with a flat-plane for higher revs and efficiency, will incorporate hybrid technology—likely a 48-volt mild-hybrid or plug-in system—to meet EU emissions requirements while targeting outputs competitive with current offerings like the 805-hp setup in the 2025 AMG GT 63 S E , which pairs a 4.0-liter V8 biturbo with electric motors for all-wheel drive and a 2.7-second 0-60 mph sprint. The initiative underscores AMG's commitment to "outgrow the performance market" by blending V8 character with , ensuring longevity for eight-cylinder engines in sports cars and sedans. Similarly, Ferrari is advancing V8 hybridization as part of a balanced strategy, planning for 40% of its lineup to remain pure internal , 40% hybrid, and 20% fully electric by 2030. Models like the SF90 Stradale, Ferrari's first , already combine a 4.0-liter V8 with three electric motors for 986 total horsepower and a 0-62 mph time of 2.5 seconds, demonstrating how V8s can integrate seamlessly with battery systems for enhanced acceleration and brief electric-only ranges of about 15 miles. Ferrari's ongoing investment in V8 variants, including future hybrids, reflects a refusal to abandon engines amid EV shifts, prioritizing driver engagement in supercars. In the truck segment, is investing heavily in V8 sustainability, allocating $888 million to upgrade its Tonawanda Propulsion plant for production of a sixth-generation small-block V8 starting in 2027, destined for full-size trucks like the next and GMC Sierra. While not explicitly hybridized in announcements, this engine aligns with GM's broader commitments for light-duty vehicles by 2027, potentially enabling V8 variants with electric assistance to boost towing capacity—up to 13,300 pounds in current models—and efficiency in response to market demand, where V8-equipped pickups still account for over 30% of full-size sales. These developments signal that V8 engines will endure through the in niche roles, hybridized to bridge the transition to full electrification.

References

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