The Ferrari 642, also known as the Ferrari F1-91, was a car built by Scuderia Ferrari for the 1991 Formula One season. The drivers were Frenchmen Alain Prost and Jean Alesi. The car secured two podiums, but suffered inconsistent handling issues and would later be replaced by the Ferrari 643 at the 1991 French Grand Prix. However, Ferrari's season was not successful, as they failed to win a race for the first time since 1986.