Cunningham C-6R

Engines considered for the car included a two-stroke inverted V-12 designed by Mercury Marine's Carl Kiekhaefer, and the Ferrari V-12 from the Italian marque's 375 MM.

[3] After consulting with Leo Goossen, the engine's designer, Cunningham's team managed to get power output up to 270 hp (201.3 kW).

The car featured conventional suspension, a De Dion rear axle, and a ZF four-speed quick shift gearbox.

Victory in the race nevertheless went to Cunningham, since Mike Hawthorn and Phil Walters were the first to cross the finish line on a Jaguar D-Type that he had reported.

Also at Le Mans - where Sherwood Johnston was Cunningham's partner - the C-6R failed after another gearbox failure.