| 1991 San Marino Grand Prix | |||
|---|---|---|---|
| Race 3 of 16 in the 1991 Formula One World Championship | |||
 The Imola circuit in its 1991 configuration | |||
| Race details | |||
| Date | 28 April 1991 | ||
| Official name | XI Gran Premio di San Marino | ||
| Location |
Autodromo Enzo e Dino Ferrari, Imola, Emilia-Romagna, Italy | ||
| Course | Permanent racing facility | ||
| Course length | 5.040 km (3.132 miles) | ||
| Distance | 61 laps, 307.440 km (191.034 miles) | ||
| Weather | Wet at start, dry by finish | ||
| Pole position | |||
| Driver | McLaren-Honda | ||
| Time | 1:21.877 | ||
| Fastest lap | |||
| Driver |
 Gerhard Berger | McLaren-Honda | |
| Time | 1:26.531 on lap 55 | ||
| Podium | |||
| First | McLaren-Honda | ||
| Second | McLaren-Honda | ||
| Third | Dallara-Judd | ||
|
Lap leaders | |||
The 1991 San Marino Grand Prix was a Formula One motor race held at Imola on 28 April 1991. It was the third race of the 1991 Formula One World Championship.
The 61-lap race was won by Brazilian Ayrton Senna, driving a McLaren-Honda, after he started from pole position. His Austrian teammate Gerhard Berger finished second, with Finn JJ Lehto third in a Dallara-Judd. It was also McLaren's first 1-2 finish since the 1989 Belgian Grand Prix.