Autódromo Juan y Oscar Gálvez · 12 April 1981
| Pos | Team | Points Breakdown | Pts | |
|---|---|---|---|---|
| 1 | Brabham Piquet 9 + Rebaque 0 | Piquet 9 + Rebaque 0 | 9 | |
| 2 | Williams Reutemann 6 + Jones 3 | Reutemann 6 + Jones 3 | 9 | |
| 3 | Renault Prost 4 + Arnoux 2 | Prost 4 + Arnoux 2 | 6 | |
| 4 | Team Lotus Angelis 1 + Mansell 0 | Angelis 1 + Mansell 0 | 1 | |
| 5 | Arrows Patrese 0 + Stohr 0 | Patrese 0 + Stohr 0 | 0 | |
| 6 | Alfa Romeo Andretti 0 + Giacomelli 0 | Andretti 0 + Giacomelli 0 | 0 | |
| 7 | McLaren Cesaris 0 + Watson 0 | Cesaris 0 + Watson 0 | 0 | |
| 8 | ATS Lammers 0 | Lammers 0 | 0 | |
| 9 | Tyrrell Zunino 0 + Cheever 0 | Zunino 0 + Cheever 0 | 0 | |
| 10 | Ferrari Villeneuve 0 + Pironi 0 | Villeneuve 0 + Pironi 0 | 0 | |
| 11 | Theodore Tambay 0 | Tambay 0 | 0 | |
| 12 | Fittipaldi Serra 0 + Rosberg 0 | Serra 0 + Rosberg 0 | 0 | |
| 13 | Ligier Laffite 0 | Laffite 0 | 0 | |
| 14 | Ensign Surer 0 | Surer 0 | 0 |
| Pos | Driver | Team | Race time / Gap | Laps | Stops | Pts | |
|---|---|---|---|---|---|---|---|
| 1 | Nelson Piquet Brabham | Brabham | 1:34:32.740 | 53 | — | 9 | |
| 2 | Carlos Reutemann Williams | Williams | +26.610s | 53 | — | 6 | |
| 3 | Alain Prost Renault | Renault | +49.980s | 53 | — | 4 | |
| 4 | Alan Jones Williams | Williams | +1:07.880 | 53 | — | 3 | |
| 5 | René Arnoux Renault | Renault | +1:31.850 | 53 | — | 2 | |
| 6 | Elio de Angelis Team Lotus | Team Lotus | — | 52 | — | 1 | |
| 7 | Riccardo Patrese Arrows | Arrows | — | 52 | — | — | |
| 8 | Mario Andretti Alfa Romeo | Alfa Romeo | — | 52 | — | — | |
| 9 | Siegfried Stohr Arrows | Arrows | — | 52 | — | — | |
| 10 | Bruno Giacomelli Alfa Romeo | Alfa Romeo | — | 51 | — | — | |
| 11 | Andrea de Cesaris McLaren | McLaren | — | 51 | — | — | |
| 12 | Jan Lammers ATS | ATS | — | 51 | — | — | |
| 13 | Ricardo Zunino Tyrrell | Tyrrell | — | 51 | — | — | |
| 14 | Gilles Villeneuve Ferrari | Ferrari | — | 40 | — | — | |
| 15 | Patrick Tambay Theodore | Theodore | — | 36 | — | — | |
| 16 | John Watson McLaren | McLaren | — | 36 | — | — | |
| 17 | Hector Rebaque Brabham | Brabham | — | 32 | — | — | |
| 18 | Chico Serra Fittipaldi | Fittipaldi | — | 28 | — | — | |
| 19 | Jacques Laffite Ligier | Ligier | — | 19 | — | — | |
| 20 | Marc Surer Ensign | Ensign | — | 14 | — | — | |
| 21 | Keke Rosberg Fittipaldi | Fittipaldi | — | 4 | — | — | |
| 22 | Nigel Mansell Team Lotus | Team Lotus | — | 3 | — | — | |
| 23 | Didier Pironi Ferrari | Ferrari | — | 3 | — | — | |
| 24 | Eddie Cheever Tyrrell | Tyrrell | — | 1 | — | — |