1. Gran Premio di San Marino
FIA Formula One World Championship round 04, San Marino, 3 May 1981
1. Gran Premio di San Marino
Sunday 3 May 1981
FIA Formula One World Championship
Entries
| No. | Car | Entrants |
|---|---|---|
| 1 | Williams FW07C Ford Cosworth DFV 3.0 V8 | Williams FW07C 
Alan Jones
Albilad Williams Racing Team |
| 2 | Williams FW07C Ford Cosworth DFV 3.0 V8 | Williams FW07C 
Carlos Reutemann
Albilad Williams Racing Team |
| 3 | Tyrrell 010 Formula 1 Ford Cosworth DFV 3.0 V8 | Tyrrell 010 Formula 1 
Eddie Cheever
Team Tyrrell |
| 4 | Tyrrell 010 Formula 1 Ford Cosworth DFV 3.0 V8 | Tyrrell 010 Formula 1 
Michele Alboreto
Team Tyrrell |
| 5 | Brabham BT49C Ford Cosworth DFV 3.0 V8 | Brabham BT49C 
Nelson Piquet
Parmalat Racing Team |
| 6 | Brabham BT49C Ford Cosworth DFV 3.0 V8 | Brabham BT49C 
Héctor Alonso Rebaque
Parmalat Racing Team |
| 7 | McLaren MP4/1 Ford Cosworth DFV 3.0 V8 | McLaren MP4/1 
John Marshall Watson
Marlboro McLaren International |
| 8 | McLaren M29C Ford Cosworth DFV 3.0 V8 | McLaren M29C
Andrea De Cesaris
Marlboro McLaren International |
| 9 | Datsun HGS-1 Ford Cosworth DFV 3.0 V8 | Datsun HGS-1 
Jan Lammers
Team ATS |
| 10 | Datsun D4 Ford Cosworth DFV 3.0 V8 | Datsun D4 
Slim Borgudd
Team ATS |
| 14 | Ensign N180B Ford Cosworth DFV 3.0 V8 | Ensign N180B 
Marc Surer
Ensign Racing |
| 15 | 1981 Renault RE20B formula one MONOPOSTO • Renault-Gordini EF1 1.5L 90º V6 Turbo | 1981 Renault RE20B formula one 
Alain Prost
Equipe Renault Elf |
| 16 | 1981 Renault RE20B formula one MONOPOSTO • Renault-Gordini EF1 1.5L 90º V6 Turbo | 1981 Renault RE20B formula one
René Arnoux
Equipe Renault Elf |
| 17 | March 811 Ford Cosworth DFV 3.0 V8 | March 811 
Eliseo Salazar
March Grand Prix |
| 18 | March 811 Ford Cosworth DFV 3.0 V8 | March 811
Derek Daly
March Grand Prix |
| 20 | Fittipaldi F8C Ford Cosworth DFV 3.0 V8 | Fittipaldi F8C 
Keke Rosberg
Fittipaldi Automotive |
| 21 | Fittipaldi F8C Ford Cosworth DFV 3.0 V8 | Fittipaldi F8C
Chico Serra
Fittipaldi Automotive |
| 22 | Alfa Romeo 179C Alfa Romeo 1260 3.0 V12 | Alfa Romeo 179C
Mario Andretti
Marlboro Team Alfa Romeo |
| 23 | Alfa Romeo 179C Alfa Romeo 1260 3.0 V12 | Alfa Romeo 179C
Bruno Giacomelli
Marlboro Team Alfa Romeo |
| 25 | Talbot-Ligier JS17 Matra MS81 3.0 V12 | Talbot-Ligier JS17
Equipe Talbot Gitanes |
| 26 | Talbot-Ligier JS17 Matra MS81 3.0 V12 | Talbot-Ligier JS17
Jacques Laffite
Equipe Talbot Gitanes |
| 27 | 1981 Ferrari 126 CK formula one chassis 052 • MONOPOSTO • Ferrari 021 1.5L 120º V6 turbo | 1981 Ferrari 126 CK formula one 
Gilles Villeneuve
Scuderia Ferrari SpA SEFAC |
| 28 | 1981 Ferrari 126 CK formula one chassis 050 • MONOPOSTO • Ferrari 021 1.5L 120º V6 turbo | 1981 Ferrari 126 CK formula one
Didier Pironi
Scuderia Ferrari SpA SEFAC |
| 29 | Arrows A3 Ford Cosworth DFV 3.0 V8 | Arrows A3
Riccardo Patrese
Ragno Arrows Beta Racing Team |
| 30 | Arrows A3 Ford Cosworth DFV 3.0 V8 | Arrows A3
Siegfried Stohr
Ragno Arrows Beta Racing Team |
| 31 | Osella FA1B Ford Cosworth DFV 3.0 V8 | Osella FA1B
Miguel Angel Guerra
Osella Squadra Corse |
| 32 | Osella FA1B Ford Cosworth DFV 3.0 V8 | Osella FA1B
Beppe Gabbiani
Osella Squadra Corse |
| 33 | Theodore TY01 Ford Cosworth DFV 3.0 V8 | Theodore TY01
Patrick Tambay
Theodore Racing Team |
| 35 | Toleman TG181 Hart 415T 1.5 L4 Turbo | Toleman TG181
Brian Henton
Candy Toleman Motorsport |
| 36 | Toleman TG181 Hart 415T 1.5 L4 Turbo | Toleman TG181
Derek Warwick
Candy Toleman Motorsport |