Race Result
| GP n. 502 - 24/03/1991 - Grand Prix of Brazil Autodromo Jose Carlos Pace |
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| Winner: | Ayrton Senna / McLaren-Honda - 1:38'28.128 | ||||||
| Pole Position: | Ayrton Senna / McLaren-Honda - 1:16.392 | ||||||
| Fastest Lap: | Nigel Mansell / Williams-Renault - 1:20.436 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 1 |  Ayrton Senna |
McLaren-Honda | 71 | 1:38'28.128 | 1 | 10 |
| 2 | 6 |  Riccardo Patrese |
Williams-Renault | 71 | +2.991 | 2 | 6 |
| 3 | 2 |  Gerhard Berger |
McLaren-Honda | 71 | +5.416 | 4 | 4 |
| 4 | 27 |  Alain Prost |
Ferrari | 71 | +18.369 | 6 | 3 |
| 5 | 20 | Nelson Piquet |
Benetton-Ford | 71 | +21.960 | 7 | 2 |
| 6 | 28 | Jean Alesi |
Ferrari | 71 | +23.641 | 5 | 1 |
| 7 | 19 | Roberto Moreno |
Benetton-Ford | 70 | + 1 lap | 14 | 0 |
| 8 | 24 | Gianni Morbidelli |
Minardi-Ferrari | 69 | + 2 laps | 21 | 0 |
| 9 | 11 |  Mika Hakkinen |
Lotus-Judd | 68 | + 3 laps | 22 | 0 |
| 10 | 25 |  Thierry Boutsen |
Ligier-Lamborghini | 68 | + s laps | 18 | 0 |
| 11 | 21 | Emanuele Pirro |
Dallara-Judd | 68 | + 3 laps | 12 | 0 |
| 12 | 7 |  Martin Brundle |
Brabham-Yamaha | 67 | + 4 lpas | 26 | 0 |
| 13 | 32 | Bertrand Gachot |
Jordan-Ford | 63 | fuel system | 10 | 0 |
| Ret | 5 | Nigel Mansell |
Williams-Renault | 59 | gear box | 3 | 0 |
| Ret | 26 | Erik Comas |
Ligier-Lamborghini | 50 | engine | 23 | 0 |
| Ret | 23 | Pierluigi Martini |
Minardi-Ferrari | 47 | spun off | 20 | 0 |
| Ret | 8 | Mark Blundell |
Brabham-Yamaha | 34 | engine | 25 | 0 |
| Ret | 29 | Eric Bernard |
Lola-Ford | 33 | radiator | 11 | 0 |
| Ret | 22 | Jyrki Jarvi Lehto |
Dallara-Judd | 22 | electrical | 19 | 0 |
| Ret | 33 | Andrea de Cesaris |
Jordan-Ford | 20 | engine | 13 | 0 |
| Ret | 4 | Stefano Modena |
Tyrrell-Honda | 19 | gear box | 9 | 0 |
| Ret | 16 | Ivan Capelli |
Leyton House-Ilmor | 16 | transmission | 15 | 0 |
| Ret | 3 |  Satoru Nakajima |
Tyrrell-Honda | 12 | spun off | 16 | 0 |
| Ret | 15 | Mauricio Gugelmin |
Leyton House-Ilmor | 9 | physical | 8 | 0 |
| Ret | 17 | Gabriele Tarquini |
AGS-Ford | 0 | suspension | 24 | 0 |
| Dnq | 18 |  Stefan Johansson |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 13 |  Pedro Chaves |
Coloni-Ford | did not qualify | 0 | ||
| Dnq | 14 | Olivier Grouillard |
Fondmetal-Ford | did not qualify | 0 | ||
| Dnq | 9 | Michele Alboreto |
Footwork-Porsche | did not qualify | 0 | ||
| Dnq | 10 | Alex Caffi |
Footwork-Porsche | did not qualify | 0 | ||
| Dnq | 34 | Nicola Larini |
Lambo-Lamborghini | did not qualify | 0 | ||
| Dnq | 35 | Eric van de Poele |
Lambo-Lamborghini | did not qualify | 0 | ||
| Dnq | 12 | Julian Bailey |
Lotus-Judd | did not qualify | 0 | ||
| Dns | 30 | Aguri Suzuki |
Lola-Ford | 0 | fuel pump | 17 | 0 |