 The former World Challenge for Endurance Drivers was renamed to the World Endurance Championship of Drivers for 1981 and the World Championship of Makes was renamed to the World Endurance Championship of Makes.Bob Garretson won the World Endurance Championship of Drivers and Lancia was awarded the World Endurance Championship of Makes.World Endurance Championship of Drivers was contested over all fifteen races however only six of the races counted towards the World Endurance Championship of Makes.