The CG911 was developed as a successor to the CG901. A significant design change involved the integration of the Ilmor 2175A V10 engine, also known as the LH10. This partnership was established after Akira Akagi formed an agreement between Ilmor and Leyton House Racing. The 2175A was a 72-degree V10 engine, initially developed in 1989, and was designed to be as compact and light as possible, measuring 593 mm (23.3 in) in length and weighing 126 kg (278 lb). For 1992, the CG911 was updated to the CG911B specification, and a CG911C specification car was entered for 1993, but it never raced.
Leyton House began the 1991 season with Maurício Gugelmin and Ivan Capelli as their drivers. The CG911's debut at the 1991 United States Grand Prix was unsuccessful, with both cars retiring by lap 40 due to gearbox issues. The team's first race finish of the season did not occur until the seventh event, the 1991 French Grand Prix, where Gugelmin secured seventh place. By the French Grand Prix, engine failures had caused six of the team's retirements. Following two more races with double retirements, the CG911 achieved its best result of the season at the 1991 Hungarian Grand Prix, with Capelli finishing in sixth place. Akira Akagi was arrested in connection with the Fuji Bank scandal. To secure funds for the team's continuation, Leyton House replaced Capelli with Karl Wendlinger for the final two races of the season. Wendlinger brought backing from Mercedes-Benz. Leyton House concluded the 1991 season in 12th place in the Constructors' Championship. Capelli finished 20th in the Drivers' Championship.
For the 1992 season, Leyton House was rebranded as March F1. The CG911 was updated to the March CG911B specification. Capelli departed for Ferrari and was permanently replaced by Wendlinger, while Gugelmin moved to Jordan and was succeeded by Paul Belmondo. March was not the sole team utilizing the Ilmor engine; Tyrrell's 020 also employed the 2175A V10. The 1992 Spanish Grand Prix proved to be a successful event for the team, with both drivers finishing the race. Wendlinger secured eighth place, and Belmondo finished twelfth. Both cars completed the 1992 Canadian Grand Prix, where Wendlinger achieved fourth place. Following the Hungarian Grand Prix, Belmondo was replaced by Emanuele Naspetti. Wendlinger's three points from the Canadian Grand Prix placed him 12th in the Drivers' Championship, and March finished ninth in the Constructors' standings.
March F1 faced significant financial difficulties leading up to the 1993 season. Although they entered the 1993 South African Grand Prix with Jan Lammers and Jean-Marc Gounon, the team did not compete. While their cars were present at the Kyalami circuit, the necessary engines were not. Facing insolvency, March ceased operations shortly thereafter and did not return to Formula One competition.
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