| «1981-04» | San Marino Grand Prix - I Gran Premio di San Marino |
| 1981-05-03 | Imola - Autodromo Internazionale Enzo e Dino Ferrari - 60 laps × 5.04 km : 302.4 km |
| Pos | Constructor | Points | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Williams • Ford Cosworth | 15 | 15 | 9 | 4 | 43 | |||||||||||
| 2 | Brabham • Ford Cosworth | 4 | - | 9 | 12 | 25 | |||||||||||
| 3 | Arrows • Ford Cosworth | - | 4 | - | 6 | 10 | |||||||||||
| 4 | Renault • Renault | - | - | 6 | - | 6 | |||||||||||
| 5 | Alfa Romeo • Alfa Romeo | 3 | - | - | - | 3 | |||||||||||
| 6 | Ensign • Ford Cosworth | - | 3 | - | - | 3 | |||||||||||
| 7 | Lotus • Ford Cosworth | - | 2 | 1 | - | 3 | |||||||||||
| 8 | Ferrari • Ferrari | - | - | - | 2 | 2 | |||||||||||
| 9 | Tyrrell • Ford Cosworth | 2 | - | - | - | 2 | |||||||||||
| 10 | Ligier • Matra | - | 1 | - | - | 1 | |||||||||||
| 11 | McLaren • Ford Cosworth | - | - | - | 1 | 1 | |||||||||||
| 12 | Theodore • Ford Cosworth | 1 | - | - | - | 1 | |||||||||||
| - | March • Ford Cosworth | - | - | - | - | - | |||||||||||
| - | Fittipaldi • Ford Cosworth | - | - | - | - | - | |||||||||||
| - | Osella • Ford Cosworth | - | - | - | - | - | |||||||||||
| - | ATS • Ford Cosworth | - | - | - | - | - | |||||||||||
| - | Toleman • Hart | - | - |
Points System
9-6-4-3-2-1 points for the top 6 places.
Best 11 results count toward Drivers' championship.
All results count towards Constructors' championship.
Half points are awarded for races stopped before three-quarter-distance was completed.
Second drivers of teams that officially entered only one car are not eligible for points. Their points are not redistributed.