The March 81C is an open-wheel race car, designed by and built by March Engineering, to compete in the 1981 IndyCar season. It was March's first successful IndyCar chassis. The March 81C chassis won two out of the eleven races that season, and scored one pole position, all with Tom Sneva. It was powered by the Ford-Cosworth DFX turbo V8 engine.[1] [2] [3]