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Caterham 7 CSR
The Caterham Seven CSR is a sports car manufactured by Caterham Cars. The CSR is the most heavily modified Caterham, though it still retains the basic look of the Super Seven. The CSR has two engine options based on the same Duratec block, though modifications and power output differ. The entry level engine produces 200 bhp (149 kW), with a 0–60 mph (0–97 km/h) time of 3.7 seconds. The upgraded engine produces 260 bhp (194 kW), with a 0–60 mph (0–97 km/h) time of 3.1 seconds and a top speed of 155 mph (249 km/h).
The CSR represents the most radical redesign of the car since the introduction of the Seven in its 48-year history. The CSR is the subject of numerous improvements over previous models (see below), though it still retains the main aesthetics of Caterhams.
While slightly heavier than other Caterhams the CSR still upholds Colin Chapman's philosophy of "add lightness." Weighing only 575 kg (1,268 lb), the CSR has excellent handling, making it extremely agile. On the skidpad, the Caterham outperforms many supercars. Its 1.05 lateral g-force beats the 2007 Porsche 997 Turbo's 0.94 G, the Ferrari F50's 1.03 G, and the Ferrari Enzo's 1.01 G.
In braking tests, the CSR performs well. From 70 mph (113 km/h) to a complete stop, the CSR took 140 feet (43 m). The 997 Turbo, stopping from 60 mph took 99 feet (30 m). The Ferrari F50 performed well, stopping from 60 mph (97 km/h) in 119 feet (36 m). For comparison, an average 2011 road car (2011 Chevrolet Cruze LS) takes 167 feet (51 m) to completely stop from 70 mph (110 km/h) and Formula One cars can stop in 56 feet (17 m) from 62 mph (100 km/h).
The CSR has excellent low-end acceleration because of its high power-to-weight ratio of 410 bhp (310 kW) per ton (260 model). It can accelerate from a stop to 60 mph (97 km/h) in 3.1 seconds (estimated), though during trials, Car and Driver magazine could only achieve 3.6 seconds. This discrepancy is due to the close gear ratios of the transmission and the rev limiter. The CSR that they tested could not reach 60 mph (97 km/h) in first gear, and required the extra 0.5 seconds to shift. Car and Driver explains:
It’s also wickedly quick, blowing past 60 mph (97 km/h) in 3.6 seconds... The Caterham had an improperly set rev limiter that cut fuel at 7,700 rpm, 300 rpm short of the redline and 2 mph (3.2 km/h) short of 60 mph (97 km/h). At 7,700 rpm, the Caterham is going 58 mph (93 km/h), so we had to do a time-consuming shift before hitting 60 mph... With the correct fuel cutoff, at 8,000 rpm... it would likely hit 60 mph (97 km/h) in the low threes.
For comparison the Porsche 997 Turbo, which has AWD and weighs over twice as much as the CSR, has a power-to-weight ratio of only 269 bhp (201 kW) per ton, but has a 0–60 mph (0–97 km/h) time of 3.4 seconds.
The CSR, as with all Caterhams, has worse performance at higher speeds with respect to both acceleration and handling because of the poor aerodynamics. Caterhams suffer not only from a high drag coefficient of Cd=0.7, but also from lift. Though there have been improvements in aerodynamics, the CSR still has 50 lb (23 kg) of lift at 100 mph (161 km/h). These factors hinder both high-end acceleration, top speed, and handling. With such strong wind resistance, it requires much more power to overcome that force and increase top speed. Lift reduces contact force on the tires, causing the car to feel "loose" and not handle as well.
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Caterham 7 CSR
The Caterham Seven CSR is a sports car manufactured by Caterham Cars. The CSR is the most heavily modified Caterham, though it still retains the basic look of the Super Seven. The CSR has two engine options based on the same Duratec block, though modifications and power output differ. The entry level engine produces 200 bhp (149 kW), with a 0–60 mph (0–97 km/h) time of 3.7 seconds. The upgraded engine produces 260 bhp (194 kW), with a 0–60 mph (0–97 km/h) time of 3.1 seconds and a top speed of 155 mph (249 km/h).
The CSR represents the most radical redesign of the car since the introduction of the Seven in its 48-year history. The CSR is the subject of numerous improvements over previous models (see below), though it still retains the main aesthetics of Caterhams.
While slightly heavier than other Caterhams the CSR still upholds Colin Chapman's philosophy of "add lightness." Weighing only 575 kg (1,268 lb), the CSR has excellent handling, making it extremely agile. On the skidpad, the Caterham outperforms many supercars. Its 1.05 lateral g-force beats the 2007 Porsche 997 Turbo's 0.94 G, the Ferrari F50's 1.03 G, and the Ferrari Enzo's 1.01 G.
In braking tests, the CSR performs well. From 70 mph (113 km/h) to a complete stop, the CSR took 140 feet (43 m). The 997 Turbo, stopping from 60 mph took 99 feet (30 m). The Ferrari F50 performed well, stopping from 60 mph (97 km/h) in 119 feet (36 m). For comparison, an average 2011 road car (2011 Chevrolet Cruze LS) takes 167 feet (51 m) to completely stop from 70 mph (110 km/h) and Formula One cars can stop in 56 feet (17 m) from 62 mph (100 km/h).
The CSR has excellent low-end acceleration because of its high power-to-weight ratio of 410 bhp (310 kW) per ton (260 model). It can accelerate from a stop to 60 mph (97 km/h) in 3.1 seconds (estimated), though during trials, Car and Driver magazine could only achieve 3.6 seconds. This discrepancy is due to the close gear ratios of the transmission and the rev limiter. The CSR that they tested could not reach 60 mph (97 km/h) in first gear, and required the extra 0.5 seconds to shift. Car and Driver explains:
It’s also wickedly quick, blowing past 60 mph (97 km/h) in 3.6 seconds... The Caterham had an improperly set rev limiter that cut fuel at 7,700 rpm, 300 rpm short of the redline and 2 mph (3.2 km/h) short of 60 mph (97 km/h). At 7,700 rpm, the Caterham is going 58 mph (93 km/h), so we had to do a time-consuming shift before hitting 60 mph... With the correct fuel cutoff, at 8,000 rpm... it would likely hit 60 mph (97 km/h) in the low threes.
For comparison the Porsche 997 Turbo, which has AWD and weighs over twice as much as the CSR, has a power-to-weight ratio of only 269 bhp (201 kW) per ton, but has a 0–60 mph (0–97 km/h) time of 3.4 seconds.
The CSR, as with all Caterhams, has worse performance at higher speeds with respect to both acceleration and handling because of the poor aerodynamics. Caterhams suffer not only from a high drag coefficient of Cd=0.7, but also from lift. Though there have been improvements in aerodynamics, the CSR still has 50 lb (23 kg) of lift at 100 mph (161 km/h). These factors hinder both high-end acceleration, top speed, and handling. With such strong wind resistance, it requires much more power to overcome that force and increase top speed. Lift reduces contact force on the tires, causing the car to feel "loose" and not handle as well.