1991 San Marino Grand Prix
Grand Prix
| Position | Driver number | Driver | Constructor | Laps | Time | Grid | Points |
|---|---|---|---|---|---|---|---|
| 1 | 1 |  Ayrton Senna |
McLaren-Honda | 61 | 1:35:14.750[2] | 1 | 10 |
| 2 | 2 |  Gerhard Berger |
McLaren-Honda | 61 | + 1.675 | 5 | 6 |
| 3 | 22 |  JJ Lehto |
Dallara-Judd | 60 | + 1 lap | 16 | 4 |
| 4 | 23 |  Pierluigi Martini |
Minardi-Ferrari | 59 | + 2 laps | 9 | 3 |
| 5 | 11 | Mika Häkkinen |
Lotus-Judd | 58 | + 3 laps | 25 | 2 |
| 6 | 12 |  Julian Bailey |
Lotus-Judd | 58 | + 3 laps | 26 | 1 |
| 7 | 25 |  Thierry Boutsen |
Ligier-Lamborghini | 58 | + 3 laps | 24 | |
| 8 | 8 | Mark Blundell |
Brabham-Yamaha | 58 | + 3 laps | 23 | |
| 9 | 35 | Eric van de Poele |
Lambo-Lamborghini | 57 | Fuel pump | 21 | |
| 10 | 26 |  Érik Comas |
Ligier-Lamborghini | 57 | + 4 laps | 19 | |
| 11 | 7 | Martin Brundle |
Brabham-Yamaha | 57 | + 4 laps | 18 | |
| 12 | 15 | Maurício Gugelmin |
Leyton House-Ilmor | 55 | Engine | 15 | |
| 13 | 19 | Roberto Moreno |
Benetton-Ford | 54 | Gearbox | 13 |
Qualifying
| Position | Driver number | Driver | Constructor | Q1 | Q2 | Q3 | Grid |
|---|---|---|---|---|---|---|---|
| 1 | 1 | Ayrton Senna |
McLaren-Honda | 1:21.877 | 1:43.633 | — | undefined |
| 2 | 6 | Riccardo Patrese |
Williams-Renault | 1:21.957 | 1:42.455 | +0.080 | undefined |
| 3 | 27 | Alain Prost |
Ferrari | 1:22.195 | 1:42.429 | +0.318 | undefined |
| 4 | 5 | Nigel Mansell |
Williams-Renault | 1:22.366 | 1:41.878 | +0.489 | undefined |
| 5 | 2 | Gerhard Berger |
McLaren-Honda | 1:22.567 | 1:40.322 | +0.690 | undefined |
| 6 | 4 | Stefano Modena |
Tyrrell-Honda | 1:23.511 | 1:44.613 | +1.634 | undefined |
| 7 | 28 | Jean Alesi |
Ferrari | 1:23.945 | 1:41.149 | +2.068 | undefined |
| 8 | 24 | Gianni Morbidelli |
Minardi-Ferrari | 1:24.762 | no time | +2.885 | undefined |
| 9 | 23 | Pierluigi Martini |
Minardi-Ferrari | 1:24.807 | no time | +2.930 | undefined |
| 10 | 3 |  Satoru Nakajima |
Tyrrell-Honda | 1:25.345 | 1:42.063 | +3.468 | undefined |
| 11 | 33 | Andrea de Cesaris |
Jordan-Ford | 1:25.491 | 1:44.118 | +3.614 | undefined |
| 12 | 32 | Bertrand Gachot |
Jordan-Ford | 1:25.531 | 1:44.897 | +3.654 | undefined |
| 13 | 19 | Roberto Moreno |
Benetton-Ford | 1:25.655 | 1:45.216 | +3.778 | undefined |
| 14 | 20 | Nelson Piquet |
Benetton-Ford | 1:25.809 | 1:42.911 | +3.932 | undefined |
| 15 | 15 | Maurício Gugelmin |
Leyton House-Ilmor | 1:25.841 | no time | +3.964 | undefined |
| 16 | 22 | JJ Lehto |
Dallara-Judd | 1:25.974 | 1:43.397 | +4.097 | undefined |
| 17 | 29 | Éric Bernard |
Lola-Ford | 1:25.983 | no time | +4.106 | undefined |
| 18 | 7 | Martin Brundle |
Brabham-Yamaha | 1:26.055 | no time | +4.178 | undefined |
| 19 | 26 | Érik Comas |
Ligier-Lamborghini | 1:26.207 | 1:46.667 | +4.330 | undefined |
| 20 | 30 | Aguri Suzuki |
Lola-Ford | 1:26.356 | no time | +4.479 | undefined |
| 21 | 35 | Eric van de Poele |
Lambo-Lamborghini | 1:26.550 | 1:47.619 | +4.673 | undefined |
| 22 | 16 | Ivan Capelli |
Leyton House-Ilmor | 1:26.602 | 1:52.949 | +4.725 | undefined |
| 23 | 8 | Mark Blundell |
Brabham-Yamaha | 1:26.778 | 1:49.539 | +4.901 | undefined |
| 24 | 25 | Thierry Boutsen |
Ligier-Lamborghini | 1:26.998 | 1:44.125 | +5.121 | undefined |
| 25 | 11 | Mika Häkkinen |
Lotus-Judd | 1:27.324 | 1:47.444 | +5.447 | undefined |
| 26 | 12 | Julian Bailey |
Lotus-Judd | 1:27.976 | 1:45.931 | +6.099 | undefined |
| 27 | 17 | Gabriele Tarquini |
AGS-Ford | 1:28.175 | no time | +6.298 | undefined |
| 28 | 18 | Fabrizio Barbazza |
AGS-Ford | 1:29.665 | no time | +7.788 | undefined |
| 29 | 10 | Alex Caffi |
Footwork-Porsche | 1:30.280 | 2:06.589 | +8.403 | undefined |
| 30 | 9 | Michele Alboreto |
Footwork-Porsche | 1:30.762 | 19:39.741 | +8.885 | undefined |