| «1991-04» | Monaco Grand Prix - XLIX Grand Prix Automobile de Monaco |
| 1991-05-12 | Monaco - 78 laps × 3.328 km : 259.584 km |
| Pos | Grid | Car | Driver | Constructor | Laps | Time / Gap | Interval | Points |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | Ayrton Senna | McLaren • Honda | 78 | 1:53:02.334 | 137.785 km/h | 10 |
| 2 | 5 | 5 | Nigel Mansell | Williams • Renault | 78 | +18.348 | +18.348 | 6 |
| 3 | 9 | 28 | Jean Alesi | Ferrari | 78 | +47.455 | +29.107 | 4 |
| 4 | 8 | 19 | Roberto Moreno | Benetton • Ford Cosworth | 77 | +1 lap | 3 | |
| 5 | 7 | 27 | Alain Prost | Ferrari | 77 | +1 lap | 2 | |
| 6 | 12 | 21 | Emanuele Pirro | Dallara • Judd | 77 | +1 lap | 1 | |
| 7 | 16 | 25 | Thierry Boutsen | Ligier • Lamborghini | 76 | +2 laps | ||
| 8 | 24 | 32 | Bertrand Gachot | Jordan • Ford Cosworth | 76 | +2 laps | ||
| 9 | 21 | 29 | Eric Bernard | Lola • Ford Cosworth | 76 | +2 laps | ||
| 10 | 23 | 26 | Erik Comas | Ligier • Lamborghini | 76 | +2 laps | ||
| 11 | 13 | 22 | JJ Lehto | Dallara • Judd | 75 | +3 laps | ||
| 12 | 14 | 23 | Pierluigi Martini | Minardi • Ferrari | 72 | +6 laps | ||
| 26 | 11 | Mika Hakkinen | Lotus • Judd | 64 | fire | |||
| 17 | 24 | Gianni Morbidelli | Minardi • Ferrari | 49 | gearbox | |||
| 15 | 15 | Mauricio Gugelmin | Leyton House • Ilmor | 43 | throttle | |||
| 2 | 4 | Stefano Modena | Tyrrell • Honda | 42 | engine | |||
| 3 | 6 | Riccardo Patrese | Williams • Renault | 42 | accident | |||
| 22 | 8 | Mark Blundell | Brabham • Yamaha | 41 | accident | |||
| 25 | 9 | Michele Alboreto | Footwork • Porsche | 39 | engine | |||
| 11 | 3 | Satoru Nakajima | Tyrrell • Honda | 35 | collision | |||
| 19 | 30 | Aguri Suzuki | Lola • Ford Cosworth | 24 | accident | |||
| 10 | 33 | Andrea de Cesaris | Jordan • Ford Cosworth | 21 | throttle | |||
| 18 | 16 | Ivan Capelli | Leyton House • Ilmor | 12 | brakes | |||
| 20 | 17 | Gabriele Tarquini | AGS • Ford Cosworth | 9 | gearbox | |||
| 6 | 2 | Gerhard Berger | McLaren • Honda | 9 | accident | |||
| 4 | 20 | Nelson Piquet | Benetton • Ford Cosworth | 0 | collision | |||
| DNQ | 12 | Julian Bailey | Lotus • Judd | |||||
| DNQ | 18 | Fabrizio Barbazza | AGS • Ford Cosworth | |||||
| DNQ | 10 | Alex Caffi | Footwork • Porsche | accident | ||||
| DNP | 34 | Nicola Larini | Lamborghini | |||||
| DNP | 35 | Eric van de Poele | Lamborghini | |||||
| DNP | 31 | Pedro Chaves | Coloni • Ford Cosworth | |||||
| DNP | 14 | Olivier Grouillard | Fondmetal • Ford Cosworth | |||||
| EXC | 7 | Martin Brundle | Brabham • Yamaha | missing check |
Fastest lap - 01:24.368 - 142.006 km/h - Alain Prost (lap 77)