| Cosworth DFV | |
|---|---|
 | |
| Overview | |
| Manufacturer |  Ford-Cosworth |
| Designer | Keith Duckworth Mike Costin |
| Production | 1967–1983 |
| Layout | |
| Configuration | V8, naturally-aspirated, 90° cylinder angle |
| Displacement | 2,993 cc (182.64 cu in) |
| Cylinder bore | 85.67 mm (3.37 in) |
| Piston stroke | 64.9 mm (2.56 in) |
| Cylinder block material | Aluminium alloy |
| Cylinder head material | Aluminium alloy |
| Valvetrain | 32-valve, DOHC, four-valves per cylinder |
| Combustion | |
| Fuel system | Mechanical indirect fuel injection |
| Fuel type | Gasoline |
| Output | |
| Power output | 400–530 hp (298–395 kW) |
| Torque output | 221–280 lb⋅ft (300–380 N⋅m) |
| Dimensions | |
| Dry weight | 168 kg (370.4 lb) |
| Chronology | |
| Successor | Ford-Cosworth HB |
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.[1]
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). It reliably produced over 400 bhp, specifically reaching 408 bhp at 9,000 rpm, and 270 ft⋅lbf (370 N⋅m) of torque at 7,000 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 (3.543 × 2.316 in), maintaining a displacement of 2,993 cc. It produced 520–530 bhp at 11,000 rpm and 280 ft⋅lbf (380 N⋅m) of torque at 8,500 rpm.
- ^ The Power and the Glory: A Century of Motor Racing by Ivan Rendall Published 1991 BBC Books ISBN 0-563-36093-3