Cosworth DFV Engine

In Their Own Story

The rain slicked the tarmac at Le Mans as the sun began to dip below the grandstands. In the pit lane, a mechanic wiped grease from his hands, staring at the exposed V8 of a prototype that had been running through the night. It was a Cosworth DFV, or perhaps a direct descendant carrying its spirit. The sound was distinct—a sharp, high-pitched scream as it climbed to 10,000 RPM, a sound that echoed from the 1970s into the modern era. For decades, this engine had been the heartbeat of champions, and tonight, under the floodlights, it continued its silent promise: reliability through chaos.

Did You Know?

• The DFV name stands for Double Four Valve, a V8 development of the earlier four-cylinder FVA which had four valves per cylinder.
• Its development in 1967 for Colin Chapman's Team Lotus was sponsored and funded by Ford, with the whole engine program funded by Ford's European division, Ford Europe.
• The engine is a 90°, 2,993 cc V8 with a bore and stroke of 85.7 × 64.8 mm, reliably producing over 400 bhp, specifically reaching 408 bhp at 9,000 rpm.
• By the end of its Formula 1 career, it achieved over 500 bhp, with a peak of 510 bhp at 11,200 rpm.
• The 1983 DFY variant had an updated bore and stroke of 90.00 × 58.83 mm, producing 520–530 bhp at 11,000 rpm.