1991 Grand Prix of Portugal
22 September - Estoril: 308.850km (4.350km x 71 laps)
Pole Position: Riccardo Patrese, Williams-Renault FW14, 1:13.001
Results
1. Riccardo Patrese Williams-Renault FW14 1:35:42.304 (193.626 km/h)
2. Ayrton Senna McLaren-Honda MP4/6 - 20.941
3. Jean Alesi Ferrari 643 - 53.554
4. Pierluigi Martini Minardi-Ferrari M191 - 1:03.498
5. Nelson Piquet Benetton-Ford B191 - 1:10.033
6. Michael Schumacher Benetton-Ford B191 - 1:16.582
7. Mauricio Gugelmin Leyton House-Ilmor CG911 - 1 lap
8. Andrea de Cesaris Jordan-Ford 191 - 1 lap
9. Gianni Morbidelli Minardi-Ferrari M191 - 1 lap
10. Roberto Moreno Jordan-Ford 191 - 1 lap
11. Erik Comas Ligier-Lamborghini JS35B - 1 lap
12. Martin Brundle Brabham-Yamaha BT60Y - 2 laps
13. Satoru Nakajima Tyrrell-Honda 020 - 3 laps
14. Mika Häkkinen Lotus-Judd 102B - 3 laps
15. Michele Alboreto Footwork-Ford FA12 - 3 laps
16. Thierry Boutsen Ligier-Lamborghini JS35B - 3 laps
17. Ivan Capelli Leyton House-Ilmor CG911 - 7 laps (Nose cone)
Fastest Lap: Nigel Mansell, 1:18.179 (200.310 km/h on lap 36)
Fastest lap time allowed to stand, despite Mansell was disqualified
Retirements
Stefano Modena Tyrrell-Honda 020 - 15 laps (Engine)
Nigel Mansell Williams-Renault FW14 - 20 laps (Disqualified/Wheel changed outside pits/Accident)
Aguri Suzuki Lola-Ford L91 - 31 laps (Gearbox)
Alain Prost Ferrari 643 - 32 laps (Engine)
Gerhard Berger McLaren-Honda MP4/6 - 34 laps (Engine)
Emanuele Pirro Dallara-Judd 191 - 53 laps (Engine)
J.J. Lehto Dallara-Judd 191 - 57 laps (Gearbox)
Mark Blundell Brabham-Yamaha BT60Y - 59 laps (Suspension)
Johnny Herbert Lotus-Judd 102B - 70 laps (Engine)
Did Not Qualify
Eric Bernard Lola-Ford L91
Gabriele Tarquini AGS-Ford JH27
Nicola Larini Lamborghini 291
Eric van de Poele Lamborghini 291
Did Not Pre-qualify
Fabrizio Barbazza AGS-Ford JH27
Olivier Grouillard Fomet-Ford F1
Alex Caffi Footwork-Ford FA12
Pedro Chaves Coloni-Ford C4
Race leaders:
Riccardo Patrese 1-17 (17 laps = 73.950 km)
Nigel Mansell 18-29 (12 laps = 52.200 km)
Riccardo Patrese 30-71 (42 laps = 182.700 km)
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Starting Grid
1. Riccardo Patrese Williams-Renault FW14 1:13.001 (214.518 km/h)
2. Gerhard Berger McLaren-Honda MP4/6 - 0.220
3. Ayrton Senna McLaren-Honda MP4/6 - 0.443
4. Nigel Mansell Williams-Renault FW14 - 0.666
5. Alain Prost Ferrari 643 - 1.351
6. Jean Alesi Ferrari 643 - 1.851
7. Mauricio Gugelmin Leyton House-Ilmor CG911 - 2.265
8. Pierluigi Martini Minardi-Ferrari M191 - 2.393
9. Ivan Capelli Leyton House-Ilmor CG911 - 2.480
10. Michael Schumacher Benetton-Ford B191 - 2.577
11. Nelson Piquet Benetton-Ford B191 - 2.665
12. Stefano Modena Tyrrell-Honda 020 - 2.706
13. Gianni Morbidelli Minardi-Ferrari M191 - 2.748
14. Andrea de Cesaris Jordan-Ford 191 - 2.935
15. Mark Blundell Brabham-Yamaha BT60Y - 3.037
16. Roberto Moreno Jordan-Ford 191 - 3.079
17. Emanuele Pirro Dallara-Judd 191 - 3.135
18. J.J. Lehto Dallara-Judd 191 - 3.531
19. Martin Brundle Brabham-Yamaha BT60Y - 3.535
20. Thierry Boutsen Ligier-Lamborghini JS35B - 3.756
21. Satoru Nakajima Tyrrell-Honda 020 - 3.925
22. Johnny Herbert Lotus-Judd 102B - 4.014
23. Erik Comas Ligier-Lamborghini JS35B - 4.225
24. Michele Alboreto Footwork-Ford FA12 - 4.329
25. Aguri Suzuki Lola-Ford L91 - 4.433
26. Mika Häkkinen Lotus-Judd 102B - 4.713
Did Not Qualify
27. Eric Bernard Lola-Ford L91 - 4.824
28. Gabriele Tarquini AGS-Ford JH27 - 5.021
29. Nicola Larini Lamborghini 291 - 5.138
30. Eric van de Poele Lamborghini 291 - 5.265
Did Not Pre-qualify
31. Fabrizio Barbazza AGS-Ford JH27 - 6.291
32. Olivier Grouillard Fomet-Ford F1 - 6.499
33. Alex Caffi Footwork-Ford FA12 - 6.520
34. Pedro Chaves Coloni-Ford C4 - 10.857