Cosworth Engineering was founded in London in 1958 by Mike Costin and Keith Duckworth, both former employees of Lotus Engineering. The company name is a portmanteau of their surnames. Early revenues came almost exclusively through Lotus, for whom Cosworth developed competition engines. Duckworth left Lotus in 1958; Costin remained there until 1962 while contributing to Cosworth in his private time. The success of Cosworth's Formula Junior engines established the company's financial foundation and allowed it to pursue more ambitious projects.
In 1966, Colin Chapman helped broker a deal between Cosworth and Ford. Ford agreed to fund Keith Duckworth's design of a new 3,000 cc Formula One engine, providing £100,000 for the project on the condition that Cosworth first develop a four-cylinder F2 engine — the FVA — as a proof of concept. The FVA, based on the Ford Cortina Crossflow block, produced 225 bhp and dominated Formula Two until 1971.
The V8 that followed, the DFV (Double Four Valve), debuted at the 1967 Dutch Grand Prix fitted to Jim Clark's Lotus 49, winning on its first outing. From 1968 it was made available for purchase by any Formula One team, and through the 1970s it became the standard engine for the majority of the field. Ferrari, BRM, and Alfa Romeo were among the few to run their own power units. The DFV produced 410 bhp at 9,000 rpm and, crucially, was light enough to be used as a stressed structural member of the car — an approach that suited Chapman's design philosophy perfectly.
The engine won a record 155 World Championship races, with its final victory coming at Detroit in 1983 when Michele Alboreto drove a Tyrrell to the flag. Several variants extended the DFV's reach beyond Formula One: the DFW was a 2,500 cc version built for the Tasman Series, and the turbocharged DFX became the dominant power unit in American IndyCar racing through the late 1970s and into the 1980s, ending the long reign of the Offenhauser engine. The DFV also won the 24 Hours of Le Mans twice in its original 3.0-litre form — with Mirage in 1975 and Rondeau in 1980.
Later DFV derivatives included the DFY of 1982, which pushed output to 520 bhp but struggled against the turbocharged machinery then taking over Formula One. The DFZ and DFR served as interim and final-evolution units for smaller teams into the early 1990s. The DFV found a second career in Formula 3000 from 1986 to 1992, with a mandatory 9,000 rpm rev limiter reducing power to approximately 420 bhp.
When the turbocharged era arrived in earnest, Cosworth developed the GBA, a 1,500 cc turbocharged V6 badged as the Ford TEC. The GBA made its Formula One debut with Alan Jones at the 1986 San Marino Grand Prix and produced approximately 900 bhp — the most powerful Formula One engine Cosworth ever built. It scored points with Jones and Patrick Tambay in 1986 and achieved podiums with the Benetton team in 1987 before the turbo era was ended by regulation.
For the return to normally aspirated engines, Cosworth produced the 3,498 cc HB V8, which debuted with Benetton in 1989 and won the Japanese Grand Prix that year. Customer units went to Jordan, Lotus, and McLaren; with McLaren in 1993, Ayrton Senna won five Grands Prix using the customer HBA specification.
The HB was developed into the EC V8, badged as the Ford Zetec-R for 1994. Producing around 740 bhp at 14,500 rpm, it powered Michael Schumacher to his first Drivers' World Championship with Benetton — the last Formula One title won by a Ford-badged engine.
In parallel with its Formula One work, Cosworth's influence in touring car and rally racing was equally transformative. The BDA series, introduced in 1969 on the Ford Kent engine block, was a belt-driven twin-cam 16-valve unit designed for rallying and touring car competition. Variants ranged from 1,599 cc to 1,975 cc and won championships across Formula Atlantic, Formula Pacific, and sports car categories throughout the 1970s and 1980s. The turbocharged BDT powered the Ford RS200 in Group B rallying, with the evolution version producing over 600 bhp.
The YB series, based on the Ford T88 block, debuted in the road-going Ford Sierra RS Cosworth in 1986 and spawned the limited-edition Sierra RS500. In competition trim, the RS500 produced upwards of 550 bhp and dominated touring car racing across multiple championships from 1987 to 1992, including the 1987 World Touring Car Championship, the 1988 and 1989 Australian Touring Car Championships, the 1988 Deutsche Tourenwagen Meisterschaft, and major wins at the Bathurst 1000 and the Spa 24 Hours.
Cosworth changed hands several times after founder Keith Duckworth sold his stake in 1980. United Engineering Industries, then Carlton Communications, then Vickers plc each held the company before Audi acquired it in 1998. Audi split the business: the engineering, manufacturing, and casting division became Cosworth Technology, while the race engine and electronics divisions were sold to Ford. Ford in turn sold Cosworth Racing in 2004 to Champ Car principals Gerald Forsythe and Kevin Kalkhoven, forming the Cosworth Group.
Cosworth continued supplying Formula One engines — most recently to Marussia through the 2013 season — before focusing on other engineering projects. In later years the company undertook engine development for Aston Martin's Valkyrie hypercar and for Gordon Murray Automotive's T.50.
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