Based on the engine in the BMW 320 Group 5, Paul Rosche developed the 1.5-litre engine used in the Brabham BMW in Formula 1 in 1981. The unit initially generated roughly 560 hp in races, but this performance was increasing all the time. In 1982, Nelson Piquet claimed the first Formula 1 victory with BMW Turbo Power. One year later, he was crowned world champion in the Brabham BMW BT52. By this point, its engine was generating 640 hp in race mode, with 2.9 bar of boost pressure. Its successor – the BMW M12/13/1 – was capable of up to 1,400 hp in qualifying mode, making it the most powerful Formula 1 engine ever. As a customer engine, it was also used by other teams, including ATS, Arrows and Benetton. Current ITR boss, Gerhard Berger, took his maiden Formula 1 victory with this engine in 1986.