Round 13 · 22 September 1991
1991 Portuguese Grand Prix: results
Riccardo Patrese (Williams) won the 1991 Portuguese Grand Prix, round 13 of the championship, held on 22 September 1991 at Autódromo do Estoril (Portugal), starting from position 1. Ayrton Senna (McLaren) and Jean Alesi (Ferrari) completed the podium. He won from pole.
Final classification
| Pos | Driver | Team | Grid | Time / gap | Pts | Status |
|---|---|---|---|---|---|---|
| 1 | Riccardo Patrese | Williams | 1 | 1:35:42.304 | 10 | Finished |
| 2 | Ayrton Senna | McLaren | 3 | +20.941 s | 6 | Finished |
| 3 | Jean Alesi | Ferrari | 6 | +53.554 s | 4 | Finished |
| 4 | Pierluigi Martini | Minardi | 8 | +63.498 s | 3 | Finished |
| 5 | Nelson Piquet | Benetton | 11 | +70.033 s | 2 | Finished |
| 6 | Michael Schumacher | Benetton | 10 | +76.582 s | 1 | Finished |
| 7 | Maurício Gugelmin | Leyton House | 7 | +1 Lap | — | +1 Lap |
| 8 | Andrea de Cesaris | Jordan | 14 | +1 Lap | — | +1 Lap |
| 9 | Gianni Morbidelli | Minardi | 13 | +1 Lap | — | +1 Lap |
| 10 | Roberto Moreno | Jordan | 21 | +1 Lap | — | +1 Lap |
| 11 | Érik Comas | Ligier | 23 | +1 Lap | — | +1 Lap |
| 12 | Martin Brundle | Brabham | 19 | +2 Laps | — | +2 Laps |
| 13 | Satoru Nakajima | Tyrrell | 17 | +3 Laps | — | +3 Laps |
| 14 | Mika Häkkinen | Team Lotus | 24 | +3 Laps | — | +3 Laps |
| 15 | Michele Alboreto | Footwork | 22 | +3 Laps | — | +3 Laps |
| 16 | Thierry Boutsen | Ligier | 20 | +3 Laps | — | +3 Laps |
| 17 | Ivan Capelli | Leyton House | 9 | — | — | Spun off |
| 18 | Stefano Modena | Tyrrell | 12 | — | — | Engine |
| 19 | Nigel Mansell | Williams | 4 | — | — | Disqualified |
| 20 | Aguri Suzuki | Lola | 25 | — | — | Transmission |
| 21 | Alain Prost | Ferrari | 5 | — | — | Engine |
| 22 | Gerhard Berger | McLaren | 2 | — | — | Engine |
| 23 | Emanuele Pirro | Dallara | 16 | — | — | Engine |
| 24 | Jyrki Järvilehto | Dallara | 18 | — | — | Gearbox |
| 25 | Mark Blundell | Brabham | 15 | — | — | Suspension |
| 26 | Johnny Herbert | Team Lotus | 26 | — | — | Engine |