Cosworth KF engine
| Company type | Racing engine |
|---|---|
| Industry | Automotive, Motorsport |
| Predecessor | Isuzu 6VD1 engine |
| Founded | 1993 |
| Headquarters | Germany / United Kingdom |
| Products | 2.5L naturally aspirated V6 racing engine |
The Cosworth-Opel KF engine is a high-performance, naturally aspirated V6 racing powerplant with a 2.5-liter displacement, engineered by Opel and enhanced by Cosworth specifically for competition in the DTM and subsequently the ITC series between 1993 and 1996. Its design was derived from the Isuzu 6VD1 (1996) 75° V6 production engine, which was originally installed in vehicles such as the Opel Monterey and Isuzu Trooper.
Weighing between 85 and 89 kilograms, this engine delivers an output ranging from 450 to 540 horsepower at a maximum of 12,500 rpm, alongside a torque peak of 220 lb-ft at 9,000 rpm. Its sophisticated architecture incorporates a dual overhead camshaft (DOHC) setup with 24 valves total—four valves per cylinder—combined with fuel injection and a dry sump lubrication system, all engineered to optimize both durability and performance in touring car racing environments.
In addition to its use in touring car championships, the Cosworth-Opel KF engine has been utilized since 2000 in the Gould GR51 open-wheel race car, competing in the British Sprint Championship, demonstrating its versatility across various motorsport disciplines.