The 1990 Formula One season was the 41st season of FIA Formula One motor racing. It featured the 1990 FIA Formula One World Championship which commenced on 11 March 1990 and ended on 4 November after sixteen races. Ayrton Senna won the Drivers' Championship for the second time, and McLaren won the Constructors' Championship.The season was a dramatic fight between Senna and former team mate Alain Prost who had made the switch to Ferrari.