Countdown to
000d 00h 00m 00s1991 San Marino Grand Prix
| Race Name: | XI Gran Premio di San Marino |
| Track: | Autodromo Enzo e Dino Ferrari |
| Round: | 3 of 16 |
| Race date: | Sunday, April 28th, 1991 |
| Race time: | 14.00 |
The Podium
| 1st | 2nd | 3rd | |
| Driver | Ayrton Senna | Gerhard Berger | JJ Lehto |
| Constructor | McLaren-Honda | McLaren-Honda | Dallara-Judd |
| Car | McLaren MP4/6 | McLaren MP4/6 | Dallara BMS-191 |
| Engine | Honda RA121E | Honda RA121E | Judd GV |
| Tyre | Goodyear | Goodyear | Pirelli |
| Time | 1:35:14.750 | 1:35:16.425 | 1:36:46.651 |
| Gap | 1.675 secs | 1 Lap |
Fastest weekend laptimes
| P | No. | Driver | Pre-qual | Qual | Race | Total | |
| 1 | 1 | Ayrton Senna McLaren-Honda | 1:21.877 0 | 1:27.168 61 | 1:21.877 61 | ||
| 2 | 6 | Riccardo Patrese Williams-Renault | 1:21.957 0 | 1:28.776 17 | 1:21.957 17 | ||
| 3 | 27 | Alain Prost Ferrari | 1:22.195 0 | 1:22.195 0 | |||
| 4 | 5 | Nigel Mansell Williams-Renault | 1:22.366 0 | No Time 0 | 1:22.366 0 | ||
| 5 | 2 | Gerhard Berger McLaren-Honda | 1:22.567 0 | 1:26.531 61 | 1:22.567 61 | ||
| 6 | 4 | Stefano Modena Tyrrell-Honda | 1:23.511 0 | 1:28.906 41 | 1:23.511 41 | ||
| 7 | 28 | Jean Alesi Ferrari | 1:23.945 0 | 1:55.709 2 | 1:23.945 2 | ||
| 8 | 24 | Gianni Morbidelli Minardi-Ferrari | 1:24.762 0 | 1:50.522 10 | 1:24.762 10 | ||
| 9 | 23 | Pierluigi Martini Minardi-Ferrari | 1:24.807 0 | 1:30.476 59 | 1:24.807 59 | ||
| 10 | 3 | Satoru Nakajima Tyrrell-Honda | 1:25.345 0 | 1:44.827 15 | 1:25.345 15 | ||
| 11 | 33 | Andrea de Cesaris Jordan-Ford Cosworth | 1:25.535 0 | 1:25.491 0 | 1:30.471 37 | 1:25.491 37 | |
| 12 | 32 | Bertrand Gachot Jordan-Ford Cosworth | 1:25.980 0 | 1:25.531 0 | 1:33.534 37 | 1:25.531 37 | |
| 13 | 19 | Roberto Moreno Benetton-Ford Cosworth | 1:25.655 0 | 1:28.423 54 | 1:25.655 54 | ||
| 14 | 20 | Nelson Piquet Benetton-Ford Cosworth | 1:25.809 0 | 2:21.555 1 | 1:25.809 1 | ||
| 15 | 15 | Mauricio Gugelmin Leyton House-Ilmor | 1:25.841 0 | 1:30.422 55 | 1:25.841 55 | ||
| 16 | 22 | JJ Lehto Dallara-Judd | 1:25.923 0 | 1:25.974 0 | 1:29.091 60 | 1:25.923 60 | |
| 17 | 29 | Éric Bernard Lola-Ford Cosworth | 1:25.983 0 | 1:33.555 17 | 1:25.983 17 | ||
| 18 | 7 | Martin Brundle Brabham-Yamaha | 1:26.055 0 | 1:30.115 57 | 1:26.055 57 | ||
| 19 | 35 | Eric van de Poele Lambo-Lamborghini | 1:26.117 0 | 1:26.550 0 | 1:30.528 57 | 1:26.117 57 | |
| 20 | 26 | Érik Comas Ligier-Lamborghini | 1:26.207 0 | 1:31.860 57 | 1:26.207 57 | ||
| 21 | 21 | Emanuele Pirro Dallara-Judd | 1:26.305 0 | 1:26.305 0 | |||
| 22 | 30 | Aguri Suzuki Lola-Ford Cosworth | 1:26.356 0 | 2:01.658 2 | 1:26.356 2 | ||
| 23 | 16 | Ivan Capelli Leyton House-Ilmor | 1:26.602 0 | 1:31.257 24 | 1:26.602 24 | ||
| 24 | 8 | Mark Blundell Brabham-Yamaha | 1:26.778 0 | 1:31.442 58 | 1:26.778 58 | ||
| 25 | 14 | Olivier Grouillard Fondmetal-Ford Cosworth | 1:26.789 0 | 1:26.789 0 | |||
| 26 | 34 | Nicola Larini Lambo-Lamborghini | 1:26.886 0 | 1:26.886 0 | |||
| 27 | 25 | Thierry Boutsen Ligier-Lamborghini | 1:26.998 0 | 1:29.368 58 | 1:26.998 58 | ||
| 28 | 11 | Mika Häkkinen Lotus-Judd | 1:27.324 0 | 1:30.481 58 | 1:27.324 58 | ||
| 29 | 12 | Julian Bailey Lotus-Judd | 1:27.976 0 | 1:29.968 58 | 1:27.976 58 | ||
| 30 | 17 | Gabriele Tarquini AGS-Ford Cosworth | 1:28.175 0 | 1:28.175 0 | |||
| 31 | 18 | Fabrizio Barbazza AGS-Ford Cosworth | 1:29.665 0 | 1:29.665 0 | |||
| 32 | 10 | Alex Caffi Footwork-Porsche | 1:30.280 0 | 1:30.280 0 | |||
| 33 | 9 | Michele Alboreto Footwork-Porsche | 1:30.762 0 | 1:30.762 0 | |||
| 34 | 31 | Pedro Chaves Coloni-Ford Cosworth | 1:31.239 0 | 1:31.239 0 |