After good experiences with the Group C2 717C, 727C and 737C from 1983 to 1985, Mazda designed a completely new car, the 757. The designer was Nigel Stroud, who was also involved in the development of Richard Lloyd's Porsche 956 and 962C. . The 757, built in Japan, bore several aerodynamic similarities to the Porsche 956 / 962C, albeit smaller. In fact, the 757 weighed only 700 kg and was equipped with a 3-rotor Wankel engine that gave about 450 horsepower. The gearbox was a 5-speed Porsche modified by Mazda, which had not judged the previous Hewland to be suitable for the 757's 3-rotor engine. The 757 ran until 1988 in class C2, showing good reliability qualities.