L'1991 United States Grand Prix è stato vinto da Ayrton Senna su McLaren.
La gara nel United States of America è stata il round 1 del 16 della stagione 1991.
The 1991 United States Grand Prix (formally the XXVIII Iceberg United States Grand Prix) motor was a Formula One race held on March 10, 1991, in Phoenix, Arizona. It was the first round of the 1991 Formula One season. The 81-lap race was won by Ayrton Senna, driving a McLaren-Honda, after he started from pole position. Alain Prost finished second in a Ferrari, with Nelson Piquet third in a Benetton-Ford. It was also the first Formula One race for future double World Champion Mika Häkkinen.
fonte: Wikipedia
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