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Audi V8
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| Audi V8 (4C) | |
|---|---|
Audi V8 | |
| Overview | |
| Manufacturer | Audi AG |
| Production | October 1988 – November 1993 |
| Assembly | Neckarsulm, Germany |
| Designer | Erwin Leo Himmel (1984) |
| Body and chassis | |
| Class | Full-size luxury car |
| Body style | 4-door saloon (sedan) |
| Layout | Longitudinal front engine Quattro permanent four-wheel drive |
| Platform | Volkswagen Group D1 (aka D11) |
| Related | Audi 100/200 |
| Powertrain | |
| Engine | 3.6 L PT V8 4.2 L ABH V8 |
| Transmission | 4-speed ZF 4HP24A automatic 5-speed manual (3.6 V8) 6-speed manual (4.2 V8) |
| Dimensions | |
| Wheelbase | SWB: 2,702 mm (106.4 in) LWB: 3,020 mm (118.9 in) |
| Length | SWB: 4,861 mm (191.4 in) LWB: 5,190 mm (204.3 in) |
| Width | 1,814 mm (71.4 in) |
| Height | 1,420 mm (55.9 in) |
| Curb weight | 3.6: 1,710 kg (3,770 lb) 4.2: 1,810 kg (3,990 lb) (Quattro) LWB: 1,770 kg (3,900 lb) |
| Chronology | |
| Successor | Audi A8 |
The Audi V8 (Typ 4C) is a four-door, full-size luxury sedan, designed, manufactured and marketed by Audi in Germany from 1988 to 1993, as the company's flagship. As the first car from Audi to use a V8 engine, it also was the first Audi to combine a quattro system with an automatic transmission. Early cars used 3.6-litre V8s, while later cars featured a 4.2-litre version of the engine. The Audi V8 was replaced by the Audi A8 in 1994, although the A8 was not marketed in North America until 1996.
The competition model of the Audi V8 won back-to-back Deutsche Tourenwagen Meisterschaft driver's titles in 1990 and 1991, with the championship winners being Hans-Joachim Stuck and Frank Biela respectively.[1][2] Audi was the first company to win back-to-back DTM titles.[2]
Overview
[edit]Standard features for the Audi V8 included a 32-valve, double overhead camshaft (DOHC) V8 engine[3] and a four-speed electronically controlled ZF 4HP24A automatic transmission providing Audi's quattro permanent four-wheel drive system.[4] A five-speed (later in production six-speed) manual transmission was also available.[5][6]
The Audi V8 had a galvanized steel body, with a 10-year anti-perforation warranty (against corrosion).[7] The Audi V8 was specifically designed to be a top of the range 'flagship' car and included a number of luxury features as standard equipment, including leather seating and Audi's quattro all wheel drive system[3] (see standard features list).[8] The Audi V8 created a new elevated image for the company, providing a viable alternative to established competitors such as Mercedes-Benz and BMW.[8] In this regard, the car was a cornerstone in developing the history of the Audi marque as it is today.[8]
Factory production commenced in October 1988, and ceased in November 1993,[3] although sales of completed vehicles continued in 1994. It was replaced by the Audi A8 in 1994.[9][10][11]
Body style
[edit]The Audi V8 used an enlarged version of the bodyshell from the Typ 44 Audi 100 and 200 models,[3][12] and was based on a stretched version of their Volkswagen Group C3 automobile platform, known either as the D1 or D11[9][12] platform. The Audi V8 differed from the Audi 100/200 with a unique grille attached to the hood, new bumpers and headlights, all-red tail lamps, 12 mm extended wheelbase, wider track, pronounced fenders, and more wood trim in the interior. Furthermore, only alloy wheels were offered, ranging from 15 to 17 inches.[12][13]
In addition to the standard-length model, there was also a long wheelbase (LWB), ('Lang' in German) version of the V8 (refer to the infobox for differences in dimensions). It was assembled at Steyr-Daimler-Puch factory in Graz (see production figures). This tradition would continue with the A8, offered in "A8L" format[12] (though only in year 2010 A8L reached the size of the V8L).
A once-off experimental Avant (estate) version was built for the wife of former Audi CEO Ferdinand Piech. This car is no longer on display at the Audi Forum Ingolstadt, but in storage in Neckarsulm. [12][14]
Powertrain
[edit]Powertrain[3] detail of the Audi V8 featured one of two all-new, all-aluminium alloy engines – both petrol engines, and both in V8 configuration with 32 valves (four valves per cylinder) with dual valve springs, and four overhead camshafts (DOHC).[15] The design set the pattern for future Audi-developed Volkswagen Group V8 engines. In addition to using an all-aluminum alloy cylinder block (when the established material was grey cast iron), the camshafts were driven using a hybrid method. A rubber/kevlar toothed timing belt, driven from the front of the crankshaft operated only the exhaust camshaft in each bank. The inlet camshafts were then operated via a simplex roller chain from the exhaust camshaft – the right bank, (cylinders 1–4) at the rear of the engine, and the left bank (cylinders 5–8) at the front of the engine, immediately behind the timing belt. This method reduced the complexity of the timing belt layout, and as a result, required fewer components, such as idler rollers and guides, and led to easier and less costly maintenance of the timing belt and associated components. The intervals for changing the timing belts varied; the 3.6 V8 (PT) required changing every 90,000 kilometres (60,000 mi),[15] whereas the 4.2 V8 (ABH) had a longer interval at 120,000 kilometres (75,000 mi).[15] A thermostatically controlled electric cooling fan also became standard, replacing the engine-driven viscous fans on earlier cars. This not only provided forced airflow for the engine coolant radiator, but also for the smaller engine oil cooler.[7]
Audi's 'trademark' quattro permanent (or semi-permanent, dependent on gearbox type) four-wheel drive system was the only offering for the drivetrain.[4] This normally distributes the engine torque as a 'default' 50:50 between front and rear axles, but can automatically dynamically apportion up to a bias of 20:80 to 80:20 front and rear.[4] The automatic transmission utilizes a hydraulically controlled multi-plate clutch to apportion drive between front and rear axles,[4][12] whereas the manual transmission variants utilize a Torsen type 1 Torque Sensing center differential.[4] The rear axle final drive unit contains a Torsen type 1 Torque Sensing differential, instead of the more common hypoid open differential.[4][12]
Engines
[edit]Both available engines used a Bosch Motronic[10][15][16] fully electronic engine control unit (ECU), with cylinder bank selective knock control,[15] dual-barrel throttle valve, lambda mixture control via intake air volume metering and exhaust gas temperature sensor, and required unleaded petrol. Fuel was delivered to the combustion chambers via eight intake manifold-sited electronic fuel injectors, fed from two common fuel rails (one per cylinder bank), and were sequentially 'fired' or activated in accordance with the engine's firing order. Whilst the 3.6 V8 was able to use 95 RON (91 AKI) fuel, for the 4.2 V8, the more expensive 98 RON (93 AKI) 'SuperPlus' unleaded was required in order to achieve the quoted power output.[15] The usage of 95 RON in the 4.2 V8 resulted in a lower power output, as well as increased fuel consumption.[15]
At the initial launch of the Audi V8, the only offering was the 3.6-litre powerplant, which displaced 3,562 cubic centimetres (217.4 cu in).[9][10] This V8 engine was derived from the 1.8 16V engine from the Golf GTI.[citation needed] It was DIN-rated with a maximum motive power output of 184 kilowatts (250 PS; 247 bhp)[3] at 5,800 revolutions per minute (rpm),[9] and generated a torque turning force of 340 newton-metres (251 lbf⋅ft) at 4,000 rpm.[10] In August 1991, Audi introduced a 4.2-litre engine, displacing 4,172 cubic centimetres (254.6 cu in),[16] to complement the choice of the existing 3.6-litre V8. This shared many components from the 3.6 V8, and the 4.2 unit was identical to the optional V8 used in the Audi S4 (aka Ur-S4), sharing the same rated outputs and ABH identification code. Like the 3.6 V8 model, the existing four-speed automatic gearbox remained available. However, a new six-speed manual gearbox replaced the five-speed manual.[3] This powerplant is identified by chrome 'V8' badges on the front grille and at trunk lid, where in some cars also '4.2 quattro' badge is present.[17]
Details and performance
[edit]| Engine (code) [3][18] |
Displacement, Type Valvetrain |
Fuel grade | Max. Motive Power at rpm (DIN 80/1269/EWG) [15] |
Max. torque at rpm |
Transmissions | 0-100 km/h (62 mph) | Top speed | Dates |
|---|---|---|---|---|---|---|---|---|
| 3.6 V8 (PT) | 3,562 cc V8 engine 32 valve DOHC |
95 RON (91 AKI) unleaded petrol |
184 kW (250 PS; 247 bhp) @ 5,800 |
340 N⋅m (251 lbf⋅ft) @ 4,000[10] |
4-sp ZF 4HP24A auto 5-sp manual |
9.9 secs‡[9] 7.6 secs*[10][15] |
232 km/h (144.2 mph)‡[9] 244 km/h (151.6 mph)*[10][15] |
10/88 ÷ 11/93 |
| 4.2 V8 (ABH) | 4,172 cc V8 engine 32 valve DOHC |
98 RON (93 AKI) unleaded petrol |
206 kW (280 PS; 276 bhp) @ 5,800 |
400 N⋅m (295 lbf⋅ft) @ 4,000[16] |
4-sp ZF 4HP24A auto 6-sp manual |
7.7 secs‡[15][16] 6.8 secs*[15][16] |
250 km/h (155.3 mph)[15] | 08/91 ÷ 11/93 |
| ‡ = with automatic transmission * = with manual transmission | ||||||||
Transmissions
[edit]A choice of transmissions were offered.[3] A ZF Friedrichshafen-sourced four-speed 4HP24A automatic transmission with a torque converter was available throughout the V8 production run. Automatic transmission has three modes: "S" – Sport; "E" – Economic and "M" – Manual operation. St mode changes gears at higher rpms than E; M allows the driver to select gears using the lever.[19] There were also two manual transmission offerings – for the 3.6: a five-speed manual gearbox, or later for the 4.2, a six-speed manual. Both manual transmission variants used a 240-millimetre (9.4 in) single-plate clutch.[19]
Details
[edit]The details of Audi V8 transmission are shown in the table below:[3]
| Transmission type |
Identification | Gear ratios | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Parts code |
ID codes |
1st | 2nd | 3rd | 4th | 5th | 6th | Reverse | Final drive | |
| 4-speed Automatic | 018 | AKD, AYU, AZG | 2.480 | 1.480 | 1.000 | 0.728 | — | — | 2.086 | 4.111 |
| 5-speed Manual | 016 | AWW | 3.500 | 1.889 | 1.231 | 0.903 | 0.730 | — | 2.200 | 4.111 |
| 6-speed manual | 01E | CBM, CBN |
3.500 | 1.889 | 1.320 | 1.034 | 0.857 (CBM), 0.806 (CBN) |
0.730 (CBM), 0.684 (CBN) |
2.750 | 4.111 |
Steering, brakes, wheels
[edit]The Audi V8 came equipped with rack and pinion power assisted steering (PAS) as standard. An electronically controlled variable assisted 'servotronic' version was also available.[3] It was fitted with a high-performance brake system,[3] which included radially ventilated disc brakes front and rear. The fronts were rather unusual – designed by Continental AG and sized at 310 millimetres (12.2 in) in diameter by 25 millimetres (0.98 in) thick, but the caliper was mounted inside the disc.[20][21] The fronts also incorporated electronic brake pad wear sensors. The rears were 269 millimetres (10.6 in) by 20 millimetres (0.79 in), and incorporated a cable-operated parking brake. A Bosch anti-lock braking system (ABS) was also standard.[22]
Standard wheels were 7.5J x 15 H2 ET35 'aero' style light alloy wheels fitted with 215/60 R15 steel-belted radial tyres. Optional multi-spoke BBS-sourced (with Audi centre-cap badge) alloy wheels were also available, in either 8.0J x 16, or 8.0J x 17 sizes.[3]
Features
[edit]The Audi V8 came standard with a range of features, including a BOSE audio system with eight speakers, walnut wood trim, leather interior, and heated seats. Some available colors included pearl white, lago blue (teal), blue mica, tornado red and black. All paint finishes were pearlescent or metallic. The lists below details other standard and optional features.[3]
Standard
[edit]Standard features that came with the Audi V8.[7]
- Anti-theft vehicle alarm system
- Drivers frontal airbag (from 1991, front passenger airbag)
- Three-point seatbelts front & rear
- Procon-ten safety system
- Child safety door locks
- First aid kit (built in armrest in the rear seats)
- Two-side galvanized bodywork
- Automatic climate control system
- Electronic cruise control
- Dual power side mirrors with electrically heated defog
- Power windows with rear window disable
- Power central locking system
- Trip information computer (6 function)
- Auto check system with radio function display
- Expandable storage/ski sack
- Tinted glass
- Rear window defogger
- Interior lighting courtesy delay
- Illuminated vanity mirrors, trunk engine compartment, glovebox, lighters and ashtray
- Audi/Bose eight-speaker music system
- GSM cellular telephone with hands-free feature (built in armrest between front seats)
- Walnut wood trim, woven wool carpets
- Power front seats with 4-position driver memory
- Electrically heatable front & rear seats
- Aerodynamic halogen headlamps with wiper/washer system
- Front wipers with intermittent mode and heated windshield washer nozzles
- Front & rear fog lights
Optional
[edit]Optional features that were offered with the Audi V8.[7]
- Electrically heated door lock cylinders
- Sports front seats with extendable thigh support
- Power operated rear window roller sunblind, with manual operated rear side window roller sunblinds
- Webasto fuel-burning cabin heater
Motorsport
[edit]
Audi developed a Group A competition version of the Audi V8 for entry into the Deutsche Tourenwagen Meisterschaft (DTM) (German Touring Car Championship) auto racing series equipped with a 309 kW (420 PS; 414 bhp), later 340 kW (462 PS; 456 bhp), 3.6 V8 engine and 6-speed manual transmission, and began racing with it in 1990 with Schmidt MotorSport (SMS) running the operation, and Hans-Joachim Stuck, Walter Röhrl and Frank Jelinski driving.[1][23] In the 1990 DTM season all of the three teams claimed together the entire podium (1st, 2nd and 3rd places) at Hockenheimring race.[24] Stuck won the title, and the following year, Audi added a second team to the mix, Audi Zentrum Reutlingen (AZR). SMS continued with Stuck and Jelinski, while AZR raced with Frank Biela and Hubert Haupt. Biela gave Audi another crown in 1991, but was unable to defend the title in 1992.[2][23][25]
For the 1992 season, Audi had changed their engines to use a 180° flatplane crankshaft, which they said had been re-forged and bent from the original 90° crossplane part as used in production model. The DTM organisers found this highly modified crankshaft deviated from original homologated standard crankshaft, and therefore deemed it illegal. Audi subsequently withdrew from the championship.[25]
During its presence at DTM the Audi V8 competed with much smaller and about 300 kg (661 lb) lighter Mercedes 190, BMW M3, and slightly smaller Opel Omega 3000. None of those cars were equipped with V8 engines or 4-wheel drive.[26]
Sales
[edit]References
[edit]- ^ a b "The DTM season 1990". DTM. Archived from the original on 30 October 2012. Retrieved 25 September 2012.
- ^ a b c "The DTM season 1991". DTM. Archived from the original on 30 October 2012. Retrieved 25 September 2012.
- ^ a b c d e f g h i j k l m n "VW Group Official Parts Catalogue" (in German). Etkainfo.com. Retrieved 25 September 2012.
- ^ a b c d e f "Das quattro-Getriebe im V8 (The quattro transmission in the V8)". AudiV8.com (in German). Retrieved 25 September 2012.
- ^ "25 Years of Audi Quattro" (Press release). AUDI AG, INGOLSTADT, Germany / Audi of America – media site. 22 February 2005. Archived from the original on 23 October 2012. Retrieved 25 September 2012.
- ^ "Always a born winner – 30 years of Audi quattro" (Press release). AUDI AG, INGOLSTADT, Germany / Audi-MediaServices.com. 2 March 2010. Archived from the original on 8 October 2011. Retrieved 25 September 2012.
- ^ a b c d "Pricing and equipment". Archived from the original on 11 May 2009. Retrieved 25 September 2012.
- ^ a b c "Der Audi V8 (The Audi V8)". AudiV8.com (in German). Retrieved 25 September 2012.
- ^ a b c d e f "Audi V8 (D11/4C) – Technische Daten". Motor Klassik (in German). Motor Presse Netzwerk. Archived from the original on 6 January 2013. Retrieved 25 September 2012.
- ^ a b c d e f g "Audi V8 3.6 (1988–1994)". TopCarGuide.com. Archived from the original on 27 March 2012. Retrieved 25 September 2012.
- ^ "Audi V8 1998 – 1994". AutoEvolution. Retrieved 25 September 2012.
- ^ a b c d e f g "The luxury class – The V8". AudiStory.24max.de. 2000–2001. Archived from the original on 2 May 2012. Retrieved 25 September 2012.
- ^ "V8 (model) – Knowledgebase". Audifans.com. Archived from the original on 11 May 2009. Retrieved 25 September 2012.
- ^ "Audi V8 Avant" (in German). 21 November 2009. Retrieved 25 September 2012.
- ^ a b c d e f g h i j k l m "Der Motor (The Engine)". AudiV8.com (in German). 1 November 2008. Retrieved 25 September 2012.
- ^ a b c d e "Audi V8 4.2 (1991–1993)". TopCarGuide.com. Archived from the original on 27 March 2012. Retrieved 25 September 2012.
- ^ Image of 4.2 V8 Audi. Retrieved 25 September 2012.
- ^ "Hot cars". Lov2xlr8.no. Retrieved 25 September 2012.
- ^ a b Audi V8 quattro Owner's Manual: 1991. Audi AG. ISBN 978-0-8376-1001-6. Retrieved 25 September 2012.
- ^ "Die innenumgriffene Scheibenbremse (UFO) (The 'inside to attack' disc brakes (UFO))". AudiV8.com (in German). 26 March 2003. Retrieved 25 September 2012.
- ^ "Crikey! Look at these brake discs? (with image)". tyresmoke.net. 24 October 2007. Archived from the original on 26 February 2012. Retrieved 25 September 2012.
- ^ "Anti-lock Braking System (ABS) G-Force Sensor Modules". Anti-lock Braking System. Switch Out. Archived from the original on 26 February 2013. Retrieved 25 September 2012.
- ^ a b Car: The Definitive Visual History of the Automobile. Penguin. 2011. pp. 252–3. ISBN 978-0-7566-8938-4.
- ^ Wagstaff, Ian (2011). Audi R8. Veloce Publishing Ltd. p. 9. ISBN 978-1-84584-327-4.
- ^ a b "DTM history at the Audi museum mobile". AudiWorld. 9 August 2012. Retrieved 25 September 2012.
- ^ "Mercedes 190 E 16v". Mercedes. Archived from the original on 18 September 2012. Retrieved 25 September 2012.
- ^ a b "Annual Report 1990". Volkswagen.
- ^ a b "Annual Report 1992". Volkswagen.
- ^ "Annual Report 1994". Volkswagen.
External links
[edit]- Audi.com – official corporate website
- AudiV8.com (in German) fanclub site with technical info
- North American Consumer Guide review with image gallery
- Christoph Bauer: DRIVE IT! – Revolutionary for almost 30 years: Audi V8, DW-TV 21 August 2017 (YouTube)
- Audi V8 at the Internet Movie Cars Database
Audi V8
View on GrokipediaIntroduction
Overview
The Audi V8 is a full-size luxury sedan manufactured by Audi AG as its flagship model from October 1988 to November 1993, with sales of completed vehicles continuing into 1994.[4][5] It succeeded the Audi 200 in the upper echelon of Audi's lineup and laid the groundwork for the subsequent A8, marking Audi's entry into the competitive full-size luxury segment against rivals like Mercedes-Benz and BMW.[4][6] Designed by Erwin Leo Himmel, who sketched the initial concept in 1984, the V8 was assembled at Audi's Neckarsulm plant in Germany.[7][8] The model introduced several key innovations, including Audi's first V8 engine, the first integration of the quattro all-wheel-drive system with an automatic transmission, and an all-aluminum construction for the V8 powerplant, which helped reduce weight while enhancing performance and refinement.[4][9] A total of approximately 21,500 units were produced, underscoring its status as a limited-run prestige vehicle that emphasized advanced engineering over mass-market appeal.[4][9]Development
The Audi V8 was conceived in the mid-1980s as Audi's strategic response to the V8-powered luxury sedans from competitors like the BMW 7 Series and Mercedes-Benz S-Class, positioning the brand in the full-size executive segment.[10] The project utilized the C3 platform shared with the Audi 100 and 200 (Typ 44), which was stretched and extensively modified to integrate a longitudinal V8 engine, enhance interior space, and elevate the overall luxury orientation while retaining Audi's emphasis on advanced engineering.[11] Ferdinand Piëch, serving as Audi's head of technical development from 1975, played a pivotal role in championing the V8's creation, insisting on its compatibility with the proprietary quattro all-wheel-drive system to differentiate the model through superior traction and performance in a luxury context.[12] Key engineering hurdles centered on reconfiguring the front-engine layout of the C3 platform to house the wider and longer V8 powerplant without compromising the quattro drivetrain's balanced power distribution or the vehicle's dynamic handling.[13] Development progressed through initial design phases in the early 1980s, with prototype testing commencing around 1987, culminating in the production model's debut at the Paris Motor Show in October 1988.[11] As part of internal experimentation, engineers built a single one-off Avant estate variant in 1989 specifically for the wife of Ferdinand Piëch, adapting the sedan's chassis and powertrain to an estate body style that was never pursued for series production.[9]Design
Body Style
The Audi V8 was produced exclusively as a four-door sedan, with no coupe or convertible variants entering production.[5] This body configuration emphasized practicality and luxury, aligning with its positioning as Audi's flagship model in the late 1980s. The design drew from the established Audi 100 C3 platform but incorporated modifications for enhanced presence, including a slightly extended wheelbase to improve rear passenger space and overall proportions.[14] Visually, the V8 stood apart from the Audi 100 through distinctive styling elements that conveyed understated elegance. A unique grille design, integrated bumpers, and flush-fitting door handles contributed to its refined appearance, while subtle luxury cues such as chrome accents on the trim and window surrounds added a premium touch without overt ostentation.[5] These features helped differentiate it as a higher-end offering, with the exterior available in a standard palette of metallic and pearlescent paint finishes to enhance its sophisticated appeal. The aerodynamic profile, with smooth body lines and underbody panels, achieved a drag coefficient of 0.34, which was competitive for the era and supported efficient high-speed performance.[15]Chassis and Suspension
The Audi V8 utilized a chassis derived from the Audi 100 platform but extended and reinforced with additional bracing to accommodate the V8 engine's torque output and the demands of the quattro all-wheel-drive system.[16] This construction incorporated two-sided galvanized steel body panels for enhanced corrosion resistance and structural integrity, contributing to a curb weight ranging from 1,710 kg for the 3.6-liter model to approximately 1,810 kg for the heavier 4.2-liter variants, depending on engine and drivetrain configuration.[5] The overall dimensions emphasized a full-size luxury sedan profile, with a wheelbase of 2,703 mm, overall length of 4,875 mm, width of 1,815 mm, and height of 1,420 mm.[15] Suspension was independent at all four corners, featuring MacPherson struts with anti-roll bars up front and control arms with anti-roll bars at the rear, paired with gas-pressurized shock absorbers for a balance of comfort and control.[16] Steering employed a power-assisted rack-and-pinion system that provided precise, well-weighted feedback without excessive effort.[16] Braking relied on ventilated disc brakes at all four wheels—310 mm diameter fronts and 270 mm rears—with anti-lock braking system (ABS) standard across the model run for improved stability during hard stops.[16] Wheels consisted of 15-inch alloy rims as standard, with 16-inch options available, shod in 215/60 VR15 high-performance tires such as the Pirelli P600; tire pressure monitoring was not equipped.[16][5] The setup delivered ride characteristics tuned toward luxury touring, with a firm yet compliant feel that absorbed major road imperfections without harshness or excessive body roll, while the quattro system's integration ensured exceptional high-speed stability and progressive handling traits.[16][17] This combination prioritized refined composure over outright sportiness, though the wide tires could transmit some road noise and firmness on uneven surfaces.[17]Powertrain
Engines
The Audi V8 featured a pair of all-aluminum V8 engines, marking Audi's first production V8 powerplants. At launch in 1988, the vehicle was equipped with a 3.6-liter V8 (engine code PT) producing 184 kW (250 PS) at 5,800 rpm and 340 Nm of torque at 4,000 rpm.[18] In 1991, a larger 4.2-liter V8 (engine code ABH) was introduced, delivering 206 kW (280 PS) at 5,800 rpm and 400 Nm at 4,000 rpm.[19] These engines provided smooth, high-revving performance suitable for the luxury sedan's grand touring character. Both engines shared a sophisticated architecture: a 90-degree V8 configuration with double overhead camshafts (DOHC) and four valves per cylinder for a total of 32 valves, constructed entirely from lightweight aluminum to reduce weight while maintaining rigidity.[20] Bore and stroke dimensions were 81 mm x 86.4 mm for the 3.6-liter unit and 84.5 mm x 93 mm for the 4.2-liter, with a compression ratio of 10.6:1 in each.[18][19] This design emphasized efficiency and power delivery across a broad rev range, contributing to the model's refined driving dynamics. The engines utilized multi-point electronic fuel injection for precise metering and optimal combustion.[18] From 1992 onward, they complied with Euro 1 emissions standards, incorporating catalytic converters to reduce harmful exhaust gases, aligning with the European Union's initial regulatory framework for new vehicles introduced that year.[21] Performance varied by displacement and transmission pairing. The 3.6-liter V8 achieved 0-100 km/h in approximately 7.6 seconds with the five-speed manual, while the 4.2-liter version improved this to 6.8 seconds with its six-speed manual.[18][19] Both were electronically limited to a top speed of 250 km/h, balancing high-speed capability with safety considerations.[22] Fuel economy reflected the engines' thirst for premium gasoline, with the 3.6-liter model averaging 10.5 L/100 km in combined driving (urban: 17.5 L/100 km; extra-urban: 8.7 L/100 km), rising to around 13-15 L/100 km under varied real-world conditions.[18][23] The larger 4.2-liter engine was similarly efficient for its output, though specific figures aligned closely with the smaller unit due to shared tuning philosophies. Maintenance for these interference engines required diligent care, particularly the timing belt, which needed replacement every 60,000 km to prevent catastrophic failure.[24]| Engine | Displacement | Power | Torque | 0-100 km/h | Top Speed |
|---|---|---|---|---|---|
| 3.6L V8 (PT) | 3,562 cm³ | 184 kW (250 PS) @ 5,800 rpm | 340 Nm @ 4,000 rpm | 7.6 s | 250 km/h (limited) |
| 4.2L V8 (ABH) | 4,172 cm³ | 206 kW (280 PS) @ 5,800 rpm | 400 Nm @ 4,000 rpm | 6.8 s | 250 km/h (limited) |
Transmissions
The Audi V8 featured the ZF 4HP24A as its primary transmission option, a four-speed automatic gearbox equipped with a lock-up torque converter for improved efficiency and reduced slippage at higher speeds.[25] This electronically controlled unit was standard on all models from 1988 to 1994, designed to handle the V8 engines' torque output while integrating seamlessly with the quattro all-wheel-drive system for smooth power delivery.[26] The transmission's hydraulic and electronic controls optimized shift quality, minimizing harshness during acceleration and ensuring precise operation under varying loads.[27] Key specifications for the ZF 4HP24A included the following gear ratios, which contributed to balanced performance across urban and highway driving:| Gear | Ratio |
|---|---|
| 1st | 2.48 |
| 2nd | 1.48 |
| 3rd | 1.00 |
| 4th | 0.73 |
| Reverse | 2.09 |
| Final Drive | 4.11[27][15] |
