The Rondeau M378 is a Group 6 sports prototype race car, designed, developed and built by Automobiles Jean Rondeau, in 1978, and was their second car. It competed in one World Sportscar Championship sports car racing event; the 1978 24 Hours of Le Mans. It was driven by Bernard Darniche, Jacky Haran, Jean Rondeau (racing driver), and its best result was a 9th-place finish at that year's event. It was powered by a , , Ford-Cosworth DFV V8 Formula One engine.The chassis is an aluminum-reinforced steel spaceframe, covered in a fiberglass panel body. This drove the rear wheels through a Hewland 5-speed manual transmission. This meant it was very light, with the total weight coming to .