The endurance racing had two world championships: the 1976 FIA World Championship for Makes for Group 5 special production cars, and the 1976 World Sportscar Championship season for Group 6 prototypes up to 3.0L. Accordingly, the 935 and the new Porsche 936 were the two-pronged Porsche effort for 1976 which was sponsored by Martini Racing, which had already supported Porsche 917 or 908 entries in 1970 and 1971, like the 1971 Le Mans winner.