Cosworth DFV

The DFV is an internal combustion engine that was originally produced by Cosworth for Formula One motor racing. The name is an abbreviation of Double Four Valve, the engine being 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 major American automotive manufacturer Ford. For many years it was the dominant engine in Formula One, with the whole engine program funded by Ford's European division, Ford Europe and engines badged as "Ford" for Formula One championship races. DFVs were widely available from the late 1960s to the mid 1980s and were used by every specialist team in F1 during this period with the exception of Ferrari, Alfa Romeo, Renault, BRM and Matra, who all designed, produced and ran their own engines. Variants of this engine were also used in other categories of racing, including CART, Formula 3000 and sports car racing.

The engine is a 90°, 2,993 cc V8 with a bore and stroke of 85.67 × 64.90 mm (3.373 × 2.555 in) producing over 400 bhp (408 bhp at 9,000 rpm, 270 ft⋅lbf (370 N⋅m) torque at 7,000 rpm was quoted) from the start reaching over 500 bhp (510 bhp at 11,200 rpm was quoted) by the end of its Formula 1 career. The 1983 DFY variant had a revised bore and stroke of 90.00 × 58.83 mm (3.543 × 2.316 in) giving 2,993 cc and 520–530 bhp at 11,000 rpm, 280 ft⋅lbf (380 N⋅m) torque at 8,500 rpm.