Race Result
| GP n. 511 - 25/08/1991 - Grand Prix of Belgium Circuit National de Francorchamps |
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| Winner: | Ayrton Senna / McLaren-Honda - 1:27'17.669 | ||||||
| Pole Position: | Ayrton Senna / McLaren-Honda - 1:47.811 | ||||||
| Fastest Lap: | Roberto Moreno / Benetton-Ford - 1:55.161 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 1 |  Ayrton Senna |
McLaren-Honda | 44 | 1:27'17.669 | 1 | 10 |
| 2 | 2 |  Gerhard Berger |
McLaren-Honda | 44 | +1.901 | 4 | 6 |
| 3 | 20 | Nelson Piquet |
Benetton-Ford | 44 | +32.176 | 6 | 4 |
| 4 | 19 | Roberto Moreno |
Benetton-Ford | 44 | +37.310 | 8 | 3 |
| 5 | 6 |  Riccardo Patrese |
Williams-Renault | 44 | +57.187 | 17 | 2 |
| 6 | 8 |  Mark Blundell |
Brabham-Yamaha | 44 | 1'40.035 | 13 | 1 |
| 7 | 12 | Johnny Herbert |
Lotus-Judd | 44 | +1'44.599 | 21 | 0 |
| 8 | 21 | Emanuele Pirro |
Dallara-Judd | 43 | + 1 lap | 25 | 0 |
| 9 | 7 | Martin Brundle |
Brabham-Yamaha | 43 | + 1 lap | 16 | 0 |
| 10 | 14 |  Olivier Grouillard |
Fondmetal-Ford | 43 | + 1 lap | 23 | 0 |
| 11 | 25 |  Thierry Boutsen |
Ligier-Lamborghini | 43 | + 1 lap | 18 | 0 |
| 12 | 23 | Pierluigi Martini |
Minardi-Ferrari | 42 | gear box | 9 | 0 |
| 13 | 33 | Andrea de Cesaris |
Jordan-Ford | 41 | engine | 11 | 0 |
| Ret | 22 |  Jyrki Jarvi Lehto |
Dallara-Judd | 33 | oil pressure | 14 | 0 |
| Ret | 4 | Stefano Modena |
Tyrrell-Honda | 33 | oil leak | 10 | 0 |
| Ret | 28 | Jean Alesi |
Ferrari | 30 | engine | 5 | 0 |
| Ret | 24 | Gianni Morbidelli |
Minardi-Ferrari | 29 | gear box | 19 | 0 |
| Ret | 26 | Erik Comas |
Ligier-Lamborghini | 25 | engine | 26 | 0 |
| Ret | 11 | Mika Hakkinen |
Lotus-Judd | 25 | engine | 24 | 0 |
| Ret | 5 | Nigel Mansell |
Williams-Renault | 22 | electrical | 3 | 0 |
| Ret | 29 | Eric Bernard |
Lola-Ford | 21 | gear box | 20 | 0 |
| Ret | 16 | Ivan Capelli |
Leyton House-Ilmor | 13 | engine | 12 | 0 |
| Ret | 3 |  Satoru Nakajima |
Tyrrell-Honda | 7 | spun off | 22 | 0 |
| Ret | 27 | Alain Prost |
Ferrari | 2 | fuel leak | 2 | 0 |
| Ret | 15 | Mauricio Gugelmin |
Leyton House-Ilmor | 1 | engine | 15 | 0 |
| Ret | 32 |  Michael Schumacher |
Jordan-Ford | 0 | clutch | 7 | 0 |
| Dnq | 17 | Gabriele Tarquini |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 18 | Fabrizio Barbazza |
AGS-Ford | did not qualify | 0 | ||
| Dnq | 13 |  Pedro Chaves |
Coloni-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 | 30 | Aguri Suzuki |
Lola-Ford | did not qualify | 0 | ||