The Lotus 56 was a gas turbine-powered four-wheel-driven racing car, designed by Maurice Philippe as Team Lotus's STP-backed entry in the 1968 Indianapolis 500. All three cars entered retired from the race, Joe Leonard's car expiring while leading just eight laps from the finish.

A variant designated the Lotus 56B was entered in three races in the 1971 Formula One season but with little success.

The 4WD concept was also used in the 1969 Lotus 63 F1 car, and the wedge shape became a prominent feature of the world championships winning Lotus 72.