Editing Cosworth DFV (section)

==Other formulae==

===Sportscar racing===
The DFV was used in [[sportscar racing]] with some modest success. The design of the crankshaft caused vibrations that resulted in reliability problems in endurance racing. In 1968, new rules for the [[Group 6 cars|Sports Prototype class]] limited engine displacement to 3 litres and Ford (UK) sponsored the DFV-powered [[Ford P68]] as their entry under the new rules. However, this car, and its derived sister the [[Ford P69|P69]], failed to finish a single race during the two seasons that they competed. In 1971 a DFV-powered [[Ligier JS3]] was able to finish first and second in two short-distance events, the best DFV-powered Sports Prototype showings to date, but was only able to achieve a non-classified finish at [[1971 24 Hours of Le Mans|Le Mans]] after mechanical troubles. The next years would show that even that unsatisfactory result was beating the odds. The DFV came into wider use in 1972, when all purpose-built racers fell under the 3-litre engine limit. Eric Broadley's [[Lola Cars|Lola]], having previously focused on the 2-litre smaller class, designed their T280 model fitted with a Cosworth engine, which was very fast though it often failed to finish. Thirteen starts of DFV-powered vehicles at the [[Le Mans 24 Hours]] during 1972–74 yielded three finishes, two of which failed to complete 300 laps. The best result for DFV-powered vehicles at Le Mans was in [[1975 24 Hours of Le Mans|1975]], when fuel consumption rules had the field using low power tuning and slower engine speeds, which slowed the race pace and mitigated the DFV's vibration problem. The top three finishers were powered by DFVs, with the Gulf-sponsored Mirage driven by [[Jacky Ickx]] and [[Derek Bell (auto racer)|Derek Bell]] finishing first.

1976 saw a slightly faster pace for the Mirage and the DFV-powered De Cadenet [[Lola Cars|Lola]], but they were eclipsed by the new turbocharged [[Porsche 936]], driven by Ickx and [[Gijs van Lennep]], in first place. After two years with DFV-powered vehicles failing to run competitive distances, a DFV-powered [[Jean Rondeau (racing driver)u|Rondeau]] was the surprise winner in the [[1980 24 Hours of Le Mans|1980 race]]. [[Jean Rondeau (racing driver)|Jean Rondeau]] and [[Jean-Pierre Jaussaud]] nursed a two lap lead over the [[Jacky Ickx]] / [[Reinhold Joest]] Porsche 908/80 charging back from earlier mechanical setbacks. Another Rondeau occupied the third spot, nine laps behind the winner. In 1981 Rondeau slightly improved on the pace of the previous year but, as in 1976, DFV-powered vehicles were again outclassed by a Porsche 936, driven this time by the old Mirage winning team of Ickx and Bell. The 1981 distance result, 340 laps, was the best ever achieved with the DFV. The DFV faded from relevance over 1982–1984, showing just two finishes of over 300 laps from fourteen starts at Le Mans.

Australian race driver Bap Romano used an ex-F1 Cosworth DFV engine (formerly used by [[McLaren]]) in his Australian designed and built [[Kaditcha]] [[Group A Sports Cars|Group A Sports Car]] through 1983 and 1984 in the [[Australian Sports Car Championship]]s. After finishing 6th in the [[1983 Australian Sports Car Championship|1983 ASCC]], winning the final round of the series, he would go on to dominate the [[1984 Australian Sports Car Championship|1984 championship]]. The renamed [[Romano WE84]] won four of the five rounds and in all bar heat two of the opening round when the car was a non-starter due to an accident in the first heat, scored fastest lap while also sitting on pole for every round. The DFV in the Romano was later replaced in late 1984 by the Cosworth DFL engine.

====Use of post-DFV variants====
1982 saw the introduction of 3.3 and 3.9 litre DFLs, endurance racing versions of the DFV, in the [[1982 World Sportscar Championship|World Endurance Championship]]. That year, the 3.3 litre variant powered the new [[Rondeau M382]] to three podium finishes with a win in the [[1000 km Monza]] event and a strong second place standing behind Porsche in season points. The DFLs proved insufficiently reliable for [[Group C|C1 class]] racing at the 24 Hours of Le Mans, achieving only three finishes in 34 starts during 1982–1984, with none achieving 300 laps. After 1982 the DFLs were never reliable or competitive in the C1 class and finished consistently behind C2 cars at Le Mans. The 3.9 litre version was completely rejected by 1985. The last start for a DFL in the C1 class at Le Mans was in 1988. 1984 saw success for the 3.3 litre version in the fuel-restricted [[Group C|C2 class]], where low power tuning mitigated its reliability issues, with two class wins on the World Championship circuit. The 3.3 litre DFL became the most used engine of the C2 class, achieving four class championships, five class wins at Le Mans between 1985 and 1990 and the best distance of any Cosworth engine at Le Mans, at 351 laps, in 1988. Reliability of the C2 class was still considered unsatisfactory, however, and as the 1980s ended, the issue led the FIA to seek a new formula to replace the C2 class. 1989 saw the introduction of the 3.5 litre DFZ variant as a C1 class engine. It had the honor of being the first Cosworth engine to finish ahead of the C2 winner at Le Mans, but it was an inconsistent finisher and not competitive within the C1 class. It proved a consistent finisher and winner in the FIA Cup class, the low powered replacement of the C2 class, in 1992. The 3.5 litre DFR variant yielded more consistent results as a C1 engine for the [[Spice Engineering|Spice]] team in 1990 and the Euro Racing team in 1991, with two third-place finishes for the former, but they were never able to challenge the Peugeots, Jaguars and Sauber Mercedes for the top spot.

===Formula 3000===
The DFV was also the engine for which the [[International Formula 3000|Formula 3000]] series was created in 1985, and thus it won every race that year. The DFV and its variants continued racing in F3000 for a decade, [[Pedro Lamy]] taking the last win for a DFV in top-class motorsport, at [[Pau Grand Prix|Pau]] in 1993, its 65th F3000 win in 123 races.