The 1991 Portuguese Grand Prix was won by Riccardo Patrese of Williams.
The race in Portugal was round 13 of 16 of the 1991 season.
The 1991 Portuguese Grand Prix was a Formula One motor race held at the Autódromo do Estoril on 22 September 1991. It was the thirteenth round of the 1991 Formula One season. The 71-lap race was won by Williams driver Riccardo Patrese after he started from pole position. Ayrton Senna finished second for the McLaren team with Ferrari driver Jean Alesi third.
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