BMW engine designer who built the 4-cylinder turbo used by Brabham in 1982. He designed the 10-cylinder unit used by Williams in 2000 before retiring.
Rosche was a German engineer best known for his work at BMW. He is notable for designing the engines of a number of BMW's high-performance models, including the M31 found in the BMW 2002 Turbo, the S14 for the E30 M3, the M12 for the 320i Turbo and the Brabham BT52, the M88 in the M1 and the S70/2 found in the V12 LMR and the McLaren F1.
Rosche joined BMW immediately after his graduation, and became very skilled at calculating camshafts. He soon became a specialist in this task, earning the nickname "Nocken-Paul" (Camshaft Paul). He later became a technical director of the BMW M racing program.
Throughout Rosche's career, engines which were designed by him personally or under his stewardship have achieved a total of 150 European Formula Two Championship and Formula One World Championship titles as well as two victories in the 24 Hours of Le Mans.
Rosche's final project before retiring at the age of 65 was the E41 for the Williams FW22. Werner Laurenz took over the position of technical director at BMW Motorsport after Rosche's retirement. Even though he had retired, Rosche was one of the team of 30 mechanics who helped to restore the Brabham BT52 that had won the 1983 Formula One season in preparation for the Goodwood Festival of Speed in 2013.