March 721

The March 721 is a Formula One car, designed, developed, and made by March Engineering for the 1972 Formula One season. It was powered by the 3.0 L (180 cu in) Ford-Cosworth DFV engine. It was driven by Ronnie Peterson, Niki Lauda, Henri Pescarolo, Rolf Stommelen and Mike Beuttler. The 721 was the successor model to the March 711 and, after the strong 1971 season, was intended to secure March's leap to the top of the Formula 1 constructors. It came in three versions: the traditional 721, the 721X, and the 721G. The basic version of the 721, which did not have an additional designation in the form of a letter, was a slightly improved version of the old 711 and was built for customers such as Frank Williams Racing Cars and Günther Hennerici's Eifelland. It also served as an interim car for the factory team until the new 721X was ready. Eifelland's car was fitted with a new bodywork designed by Luigi Colani and was renamed as Eifelland E21. The March 721X was a completely new design. The rear springs were highly hinged and could be operated via levers and springs.