| «1986-14» | Portugal Grand Prix - XV Grande Premio de Portugal |
| 1986-09-21 | Estoril - Autódromo Fernanda Pires da Silva - 70 laps × 4.35 km : 304.5 km |
| Pos | Grid | Car | Driver | Constructor | Laps | Time / Gap | Interval | Points |
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 5 | Nigel Mansell | Williams • Honda | 70 | 1:37:21.900 | 187.644 km/h | 9 |
| 2 | 3 | 1 | Alain Prost | McLaren • TAG Porsche | 70 | +18.772 | +18.772 | 6 |
| 3 | 6 | 6 | Nelson Piquet | Williams • Honda | 70 | +49.274 | +30.502 | 4 |
| 4 | 1 | 12 | Ayrton Senna | Lotus • Renault | 69 | +1 lap | 3 | |
| 5 | 13 | 27 | Michele Alboreto | Ferrari | 69 | +1 lap | 2 | |
| 6 | 8 | 28 | Stefan Johansson | Ferrari | 69 | +1 lap | 1 | |
| 7 | 10 | 25 | René Arnoux | Ligier • Renault | 69 | +1 lap | ||
| 8 | 5 | 19 | Teo Fabi | Benetton • BMW | 68 | out of fuel | ||
| 9 | 15 | 11 | Johnny Dumfries | Lotus • Renault | 68 | +2 laps | ||
| 10 | 21 | 18 | Thierry Boutsen | Arrows • BMW | 67 | +3 laps | ||
| 11 | 22 | 17 | Christian Danner | Arrows • BMW | 67 | +3 laps | ||
| 12 | 20 | 14 | Jonathan Palmer | Zakspeed | 67 | +3 laps | ||
| 13 | 27 | 22 | Allen Berg | Osella • Alfa Romeo | 63 | +7 laps | ||
| 9 | 7 | Riccardo Patrese | Brabham • BMW | 62 | engine | |||
| DNC | 14 | 16 | Patrick Tambay | Lola • Ford Cosworth | 62 | |||
| 18 | 24 | Alessandro Nannini | Minardi • Motori Moderni | 60 | gearbox | |||
| 4 | 20 | Gerhard Berger | Benetton • BMW | 44 | collision | |||
| 16 | 23 | Andrea de Cesaris | Minardi • Motori Moderni | 43 | spin | |||
| 7 | 2 | Keke Rosberg | McLaren • TAG Porsche | 41 | engine | |||
| 12 | 8 | Derek Warwick | Brabham • BMW | 41 | ignition | |||
| 11 | 26 | Philippe Alliot | Ligier • Renault | 39 | engine | |||
| 23 | 4 | Philippe Streiff | Tyrrell • Renault | 28 | engine | |||
| 19 | 3 | Martin Brundle | Tyrrell • Renault | 18 | engine | |||
| 17 | 15 | Alan Jones | Lola • Ford Cosworth | 10 | accident | |||
| 26 | 29 | Huub Rothengatter | Zakspeed | 9 | crown wheel | |||
| 24 | 21 | Piercarlo Ghinzani | Osella • Alfa Romeo | 8 | water leak | |||
| 25 | 31 | Ivan Capelli | AGS • Motori Moderni | 6 | transmission |
Fastest lap - 01:20.943 - 193.469 km/h - Nigel Mansell (lap 53)