Williams
Riccardo Patrese a terminé P3 du Championnat du Monde 1991 avec 53 points. En 16 courses : 2 victoires, 8 podiums et 4 pole positions — meilleur résultat P1.
| Round | Race | Team | Grid | Finish | Points | Status |
|---|---|---|---|---|---|---|
| 1 | United States Grand Prix | Williams | 3 | P14 | Gearbox | |
| 2 | Brazilian Grand Prix | Williams | 2 | P2 | 6 | Finished |
| 3 | San Marino Grand Prix | Williams | 2 | P19 | Electrical | |
| 4 | Monaco Grand Prix | Williams | 3 | P17 | Spun off | |
| 5 | Canadian Grand Prix | Williams | 1 |
| P3 |
| 4 |
| Finished |
| 6 | Mexican Grand Prix | Williams | 1 | P1 | 10 | Finished |
| 7 | French Grand Prix | Williams | 1 | P5 | 2 | +1 Lap |
| 8 | British Grand Prix | Williams | 3 | P26 | Collision |
| 9 | German Grand Prix | Williams | 4 | P2 | 6 | Finished |
| 10 | Hungarian Grand Prix | Williams | 2 | P3 | 4 | Finished |
| 11 | Belgian Grand Prix | Williams | 17 | P5 | 2 | Finished |
| 12 | Italian Grand Prix | Williams | 4 | P21 | Gearbox |
| 13 | Portuguese Grand Prix | Williams | 1 | P1 | 10 | Finished |
| 14 | Spanish Grand Prix | Williams | 4 | P3 | 4 | Finished |
| 15 | Japanese Grand Prix | Williams | 5 | P3 | 4 | Finished |
| 16 | Australian Grand Prix | Williams | 4 | P5 | 1 | Finished |