San Marino Grand Prix
Round 4 · 3 May 1981 ·Autodromo Enzo e Dino Ferrari, Imola, Italy
Patrese
Arrows
2
Piquet
Brabham
1
Reutemann
Williams
3
Race classification
| Pos. | Driver | Nationality | Team | Laps | Time | Pts. |
|---|---|---|---|---|---|---|
| 1 | Nelson Piquet | Brabham | 60 | 1:51:23.97 | 9 | |
| 2 | Riccardo Patrese | Arrows | 60 | +4.58 | 6 | |
| 3 | Carlos Reutemann | Williams | 60 | +6.34 | 4 | |
| 4 | Hector Rebaque | Brabham | 60 | +22.89 | 3 | |
| 5 | Didier Pironi | Ferrari | 60 | +25.87 | 2 | |
| 6 | Andrea de Cesaris | McLaren | 60 | +1:06.61 | 1 | |
| 7 | Gilles Villeneuve | Ferrari | 60 | +1:41.97 | 0 | |
| 8 | René Arnoux | Renault | 59 | +1 Lap | 0 | |
| 9 | Marc Surer | Ensign | 59 | +1 Lap | 0 | |
| 10 | John Watson | McLaren | 58 | +2 Laps | 0 | |
| 11 | Patrick Tambay | Theodore | 58 | +2 Laps | 0 | |
| 12 | Alan Jones | Williams | 58 | +2 Laps | 0 | |
| 13 | Slim Borgudd | ATS | 57 | +3 Laps | 0 | |
| N | Jean-Pierre Jabouille | Ligier | 45 | Not classified | 0 | |
| R | Eliseo Salazar | March | 38 | Spun off | 0 | |
| R | Michele Alboreto | Tyrrell | 31 | Collision | 0 | |
| R | Beppe Gabbiani | Osella | 31 | Collision | 0 | |
| R | Bruno Giacomelli | Alfa Romeo | 28 | Collision | 0 | |
| R | Eddie Cheever | Tyrrell | 28 | Collision | 0 | |
| R | Mario Andretti | Alfa Romeo | 26 | Gearbox | 0 | |
| R | Keke Rosberg | Fittipaldi | 14 | Engine | 0 | |
| R | Jacques Laffite | Ligier | 7 | Suspension | 0 | |
| R | Alain Prost | Renault | 3 | Gearbox | 0 | |
| R | Miguel Ángel Guerra | Osella | 0 | Accident | 0 | |
| F | Siegfried Stohr | Arrows | 0 | Did not qualify | 0 | |
| F | Derek Daly | March | 0 | Did not qualify | 0 | |
| R | Jan Lammers | ATS | 0 | Retired | 0 | |
| F | Chico Serra | Fittipaldi | 0 | Did not qualify | 0 | |
| F | Derek Warwick | Toleman | 0 | Did not qualify | 0 | |
| F | Brian Henton | Toleman | 0 | Did not qualify | 0 | |
| W | Elio de Angelis | Team Lotus | 0 | Withdrew | 0 | |
| W | Nigel Mansell | Team Lotus | 0 | Withdrew | 0 |
- R
- Retired
- F
- Failed to qualify
- W
- Withdrew
- N
- Not classified