1975 World Championship for MakesInternational Cup for GT Cars Alfa Romeo Porsche - - 1976 World Championship for Makes Porsche - - 1976 World Championship for Sports Cars Porsche - - 1977 World Championship for Makes Porsche - - 1977 World Championship for Sports Cars Alfa Romeo - - 1978 World Championship for Makes Porsche - - 1979 World Championship for Makes Porsche (+2.0) Lancia (2.0) - - 1980 World Championship for Makes Porsche (+2.0) Lancia (2.0) - - 1981 World Endurance Championship Porsche (+2.0) Lancia (2.0) - Bob Garretson 1982 World Endurance Championship Porsche -2 Jacky Ickx 1983 World Endurance Championship Porsche (C) Alba-Giannini (C Jnr) Porsche (B) - 1984 World Endurance Championship Porsche (C) Alba-Giannini (C Jnr) BMW (B) - Stefan Bellof 1985 World Endurance Championship - Rothmans Porsche (C) Spice Engineering (C2) Derek Bell (C) Hans-Joachim Stuck (C) Gordon Spice (C2) Ray Bellm (C2) 1986 World Sports Prototype Championship - Brun Motorsport (C) Ecurie Ecosse (C2) Derek Bell (C) Gordon Spice (C2) Ray Bellm (C2) 1987 World Sports Prototype Championship -2 Silk Cut Jaguar (C) Spice Engineering (C2) Raúl Boesel (C) Gordon Spice (C2) Fermín Vélez (C2) 1988 World Sports Prototype Championship - Martin Brundle (C) Gordon Spice (C2) Ray Bellm (C2) 1989 World Sports Prototype Championship - Team Sauber Mercedes