| «1991-13» | Portugal Grand Prix - XX Grande Premio de Portugal |
| 1991-09-22 | Estoril - Autódromo Fernanda Pires da Silva - 71 laps × 4.35 km : 308.85 km |
| Pos | Constructor | Points | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | McLaren • Honda | 10 | 14 | 16 | 10 | - | 4 | 4 | 9 | 3 | 13 | 16 | 9 | 6 | 114 | |||
| 2 | Williams • Renault | - | 6 | - | 6 | 5 | 16 | 12 | 10 | 16 | 10 | 2 | 10 | 10 | 103 | |||
| 3 | Ferrari • Ferrari | 6 | 4 | - | 6 | - | - | 9 | 4 | 4 | 2 | - | 4 | 4 | 43 | |||
| 4 | Benetton • Ford Cosworth | 4 | 2 | - | 3 | 10 | 2 | - | 2 | - | - | 7 | 3 | 3 | 36 | |||
| 5 | Jordan • Ford Cosworth | - | - | - | - | 5 | 3 | 1 | 1 | 3 | - | - | - | - | 13 | |||
| 6 | Tyrrell • Honda | 5 | - | - | - | 6 | - | - | - | - | - | - | - | - | 11 | |||
| 7 | Minardi • Ferrari | - | - | 3 | - | - | - | - | - | - | - | - | - | 3 | 6 | |||
| 8 | Dallara • Judd | - | - | 4 | 1 | - | - | - | - | - | - | - | - | - | 5 | |||
| 9 | Lotus • Judd | - | - | 3 | - | - | - | - | - | - | - | - | - | - | 3 | |||
| 10 | Lola • Ford Cosworth | 1 | - | - | - | - | 1 | - | - | - | - | - | - | - | 2 | |||
| 11 | Leyton House • Ilmor | - | - | - | - | - | - | - | - | - | 1 | - | - | - | 1 | |||
| 12 | Brabham • Yamaha | - | - | - | - | - | - | - | - | - | - | 1 | - | - | 1 | |||
| - | AGS • Ford Cosworth | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |||
| - | Fondmetal • Ford Cosworth | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |||
| - | Lamborghini • Lamborghini | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |||
| - | Ligier • Lamborghini | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |||
| - | Coloni • Ford Cosworth | - | - | - | - | - | - | - | - | - | - | - | - | - | - | |||
| - | Footwork • Porsche | - | - | - | - | - | - | - | ||||||||||
| - | Footwork • Ford Cosworth | - | - | - | - | - | - | - | - |
Points System
10-6-4-3-2-1 points for the top 6 places.
Half points are awarded for races stopped before three-quarter-distance was completed.