Editing Cosworth DFV (section)

{{short description|Internal combustion engine}}
{{Infobox automobile engine
| name = [[Cosworth]] DFV
| image = Cosworth DFV.jpg
| manufacturer = {{flagicon|UK}} [[Ford Motor Company|Ford]]-[[Cosworth]]
| designer = [[Keith Duckworth]]<br>[[Mike Costin]]
| production = 1967–1983
| configuration = [[V8 engine|V8]], [[naturally aspirated|naturally-aspirated]], 90° cylinder angle
| displacement = {{cvt|2987.1|cc|cuin|2|lk=on}}
| bore = {{cvt|85.6742|mm|in|2|lk=on}}
| stroke = {{cvt|64.77|mm|in|2|lk=on}}
| block = [[Aluminium]] alloy
| head = [[Aluminium]] alloy
| valvetrain = 32-valve, [[DOHC]], four-valves per cylinder
| power = {{cvt|400-530|hp|kW|0|lk=on}}
| torque = {{cvt|221-280|lbft|Nm|0|lk=on}}
| oilsystem = [[Dry sump]]
| weight = {{cvt|168|kg|lb|1|lk=on}}
| fuelsystem = Mechanical indirect fuel injection
| fueltype = [[Gasoline]]
| successor = [[Ford-Cosworth HB engine|Ford-Cosworth HB]]
}}
{{Listen|type=sound|filename=Ford F3L (1968).ogg|title=1968 Ford P68|filename2=Tyrrell-Cosworth 002 (1971).ogg|title2=1971 Tyrrell-Cosworth 002|filename3=Lotus-Cosworth 79 (1978).ogg|title3=1978 Lotus-Cosworth 79}}
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 [[Cosworth#The FVA series|FVA]], which had four valves per cylinder.<ref>The Power and the Glory: A Century of Motor Racing by Ivan Rendall Published 1991 BBC Books {{ISBN|0-563-36093-3}}</ref>

Its development in 1967 for [[Colin Chapman]]'s [[Team Lotus]] was sponsored and funded by major American automotive manufacturer [[Ford Motor Company|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 [[Championship Auto Racing Teams|CART]], [[Formula 3000]] and [[sports car racing]].

The engine is a 90°, 2,993&nbsp;cc [[V8 engine|V8]] with a bore and stroke of 85.67 × 64.90&nbsp;mm (3.373 × 2.555 in). It reliably produced over 400&nbsp;bhp, specifically reaching 408&nbsp;bhp at 9,000&nbsp;rpm, and {{cvt|270|ft.lbf|N.m}} of torque at 7,000&nbsp;rpm. By the end of its Formula 1 career, it achieved over 500&nbsp;bhp, with a peak of 510&nbsp;bhp at 11,200&nbsp;rpm.

The 1983 DFY variant had an updated bore and stroke of 90.00 × 58.83&nbsp;mm (3.543 × 2.316 in), maintaining a displacement of 2,993&nbsp;cc. It produced 520–530&nbsp;bhp at 11,000&nbsp;rpm and {{cvt|280|ft.lbf|N.m}} of torque at 8,500&nbsp;rpm.