In , Renault entered Formula One with a turbocharged engine. After the success Renault had, BMW decided to develop its own turbo engine. BMW announced the new program in April 1980. The engine was based on the BMW M10, a four-cylinder, 1.5 litre, normally aspirated (non-turbocharged) engine designed in the late 1950s. The racing version, the M12, had been successful in Formula Two and other series. The prototype 1.4 litre turbo engine soon developed 600 bhp. It used a single Kühnle, Kopp & Kausch (KKK) turbocharger, Bosch electronics, and fuel injection. This engine was developed into the M12/13, the race engine BMW supplied to five teams from 1982 to 1988.