BOAC 1000k 1971

The 1971 BOAC 100kms was the fourth round of the World Sports Car Championship and was won by the Autodelta Alfa Romeo T33/3 driven by Andrea de Adamich and Henri Pescarolo. Jacky Ickx and Clay Regazzoni were second in a works Ferrari 312PB while Jo Siffert and Derek Bell brought their JW Porsche 917K home in third place. Porsche went on to win the championship from Alfa Romeo and Ferrari