1. Design and specification

2. Racing

3. Series 2

4. Engine variants

5. References

6. External links

The Caterham 21 is a two-seat roadster designed and hand built by Caterham Cars in the 1990s. It was based on the mechanicals of the Caterham 7 and was intended to be a more practical version of that car with more conventional sports car styling.^[1]

The original car was produced for the 1994 British Motor Show to celebrate 21 years of Caterham Cars manufacture of the Lotus Seven. Styled by Iain Robertson and developed by a team under Jez Coates, the aim was to have a car that offered "the chance to experience Caterham motoring in a more practical format".

The 21 was offered with a range of four-cylinder engines from 1.6 to 2.0 L, with {{Convert|115-230|hp|0|abbr=on}}.^[2] Caterham originally intended to produce 200 cars per year, but fewer than 50 were actually made before production ceased. Several variations were created to participate in racing events.

The current owners run a regular gathering at a sprint track in the UK, with over 16 cars attending each year out of 48 produced.{{cn|date=January 2015}}

Design and specification

Being almost mechanically identical to the Caterham 7, the 21 was set apart by the design of the body. Inspiration was drawn from the design of the Lotus Eleven, and the result was a curved, low-slung shape. The styling was universally well received. The car did not have wind-up windows and its door sills were high and wide, which drew some criticism from contemporary reviewers regarding the car's practicality. Because of extra strengthening in the sills and at the front end, the chassis was 150% as rigid as that in the 7. Adjustments to the suspension gave a better ride as well.^[1]

Some components were taken from mainstream models (such as the rear light clusters from the Mk1 Ford Mondeo hatchback, door mirrors from the Rover 200, front indicators from the Suzuki Cappuccino, etc.) in addition to the Seven-based mechanical underpinnings.

Most of the 49 cars built by the factory were fitted with either the 1.6L or 1.8L variants of the K-Series engine, all of which were controlled by the Rover MEMS ECU. Two cars were built with engines in the "Very High Performance Derivative" (VHPD) specification. The Ford Type 9 transmission, as used in the Ford Sierra, was the standard gearbox, with Caterham's own 6-speed manual offered as an option. With the {{Convert|133|hp|0|abbr=on}} engine tune, the base car was capable of 0-60 mph (97 km/h) in 6.7 seconds and a top speed of {{Convert|127|mph|0|abbr=on}}.^[1]

A single fixed-roof car, named the 21 GTO, was built to be used for racing. This car was equipped with the {{Convert|230|hp|0|abbr=on}} engine from the Caterham 7 R500, and with it the GTO was capable of a 0–60 mph (97 km/h) sprint in 3.8 seconds and a top speed of {{Convert|153|mph|0|abbr=on}}.^[1]

Racing

The GT editions of the 21 were successfully raced from 1999 to 2001, including the GT car run by GPS Racing winning its class in the Belcar 24hr race and resoundingly beating the Lotus Elises in that class. Caterham used the GTO car to develop the Minister R500 engine. Caterham's final GTO car ended up with Great Lakes Caterham in Michigan, US and has now been fitted with the RST-V8 engine, now used in Caterham's top-of the line Levante model (supercharged to 500 bhp).

The Belgian car is still being raced in a series in continental Europe and may well be joined by a new race car running a Duratec engine early in 2009.

Series 2

A single series 2 prototype was created by Caterham, with a view to fitting a "standard" superstructure from an MGF and having enough space for a larger power plant, moving the car into the territory occupied at the time by manufacturers such as TVR. Unlike the original, it received a lukewarm reception and wasn't put into production.

Engine variants

The 48 cars made are now fitted with a range of engines, including some not offered at the point the car was originally released:{{cn|date=January 2015}}

• Rover K-Series 1.6
• Rover K-Series 1.6 SuperSport
• Rover K-Series 1.8
• Rover K-Series 1.8 SuperSport
• Rover K-Series 1.8 VVC
• Rover K-Series 1.8 VVC-160
• Rover K-Series 1.8 VHPD
• Vauxhall 2.0L
• RST-V8

References

External links

• Caterham21.com

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