Autódromo do Estoril · 21 September 1986
Nigel Mansell won the 1986 Portuguese Grand Prix for Williams from 2nd on the grid, 18.772s ahead of Alain Prost. Allen Berg gained the most places, from 27th on the grid to 13th.
| Pos | Team | Points Breakdown | Pts | |
|---|---|---|---|---|
| 1 | Williams Mansell 9 + Piquet 4 | Mansell 9 + Piquet 4 | 13 | |
| 2 | McLaren Prost 6 + Rosberg 0 | Prost 6 + Rosberg 0 | 6 | |
| 3 | Team Lotus Senna 3 + Dumfries 0 | Senna 3 + Dumfries 0 | 3 | |
| 4 | Ferrari Alboreto 2 + Johansson 1 | Alboreto 2 + Johansson 1 | 3 | |
| 5 | Ligier Arnoux 0 + Alliot 0 | Arnoux 0 + Alliot 0 | 0 | |
| 6 | Benetton Fabi 0 + Berger 0 | Fabi 0 + Berger 0 | 0 | |
| 7 | Arrows Boutsen 0 + Danner 0 | Boutsen 0 + Danner 0 | 0 | |
| 8 | Zakspeed Palmer 0 + Rothengatter 0 | Palmer 0 + Rothengatter 0 | 0 | |
| 9 | Osella Berg 0 + Ghinzani 0 | Berg 0 + Ghinzani 0 | 0 | |
| 10 | Brabham Patrese 0 + Warwick 0 | Patrese 0 + Warwick 0 | 0 | |
| 11 | Lola Tambay 0 + Jones 0 | Tambay 0 + Jones 0 | 0 | |
| 12 | Minardi Nannini 0 + de Cesaris 0 | Nannini 0 + de Cesaris 0 | 0 | |
| 13 | Tyrrell Streiff 0 + Brundle 0 | Streiff 0 + Brundle 0 | 0 | |
| 14 | AGS Capelli 0 | Capelli 0 | 0 |
| Pos | Driver | Team | Race time / Gap | Laps | Stops | Pts | |
|---|---|---|---|---|---|---|---|
| 1 | Nigel Mansell Williams | Williams | 1:37:21.900 | 70 | — | 9 | |
| 2 | Alain Prost McLaren | McLaren | +18.772s | 70 | — | 6 | |
| 3 | Nelson Piquet Williams | Williams | +49.274s | 70 | — | 4 | |
| 4 | Ayrton Senna Team Lotus | Team Lotus | DNF Out of fuel | 69 | — | 3 | |
| 5 | Michele Alboreto Ferrari | Ferrari | +1 Lap | 69 | — | 2 | |
| 6 | Stefan Johansson Ferrari | Ferrari | +1 Lap | 69 | — | 1 | |
| 7 | René Arnoux Ligier | Ligier | +1 Lap | 69 | — | — | |
| 8 | Teo Fabi Benetton | Benetton | +2 Laps | 68 | — | — | |
| 9 | Johnny Dumfries Team Lotus | Team Lotus | +2 Laps | 68 | — | — | |
| 10 | Thierry Boutsen Arrows | Arrows | +3 Laps | 67 | — | — | |
| 11 | Christian Danner Arrows | Arrows | +3 Laps | 67 | — | — | |
| 12 | Jonathan Palmer Zakspeed | Zakspeed | +3 Laps | 67 | — | — | |
| 13 | Allen Berg Osella | Osella | +7 Laps | 63 | — | — | |
| DNF | Riccardo Patrese Brabham | Brabham | DNF Engine | 62 | — | — | |
| NC | Patrick Tambay Lola | Lola | NC | 62 | — | — | |
| NC | Alessandro Nannini Minardi | Minardi | NC | 60 | — | — | |
| DNF | Gerhard Berger Benetton | Benetton | DNF Spun off | 44 | — | — | |
| DNF | Andrea de Cesaris Minardi | Minardi | DNF Spun off | 43 | — | — | |
| DNF | Keke Rosberg McLaren | McLaren | DNF Electrical | 41 | — | — | |
| DNF | Derek Warwick Brabham | Brabham | DNF Electrical | 41 | — | — | |
| DNF | Philippe Alliot Ligier | Ligier | DNF Engine | 39 | — | — | |
| DNF | Philippe Streiff Tyrrell | Tyrrell | DNF Engine | 28 | — | — | |
| DNF | Martin Brundle Tyrrell | Tyrrell | DNF Engine | 18 | — | — | |
| DNF | Alan Jones Lola | Lola | DNF Brakes | 10 | — | — | |
| DNF | Huub Rothengatter Zakspeed | Zakspeed | DNF Transmission | 9 | — | — | |
| DNF | Piercarlo Ghinzani Osella | Osella | DNF Engine | 8 | — | — | |
| DNF | Ivan Capelli AGS | AGS | DNF Transmission | 6 | — | — |