| «1988-13» | Portugal Grand Prix - XVII Grande Premio de Portugal |
| 1988-09-25 | Estoril - Autódromo Fernanda Pires da Silva - 70 laps × 4.35 km : 304.5 km |
| Pos | Car | Driver | Constructor | Time | Speed | Lap | Gap |
|---|---|---|---|---|---|---|---|
| 1 | 28 | Gerhard Berger | Ferrari | 01:21.961 | 191.066 km/h | 31 | |
| 2 | 20 | Thierry Boutsen | Benetton • Ford Cosworth | 01:21.992 | 190.994 km/h | 60 | +00.031 |
| 3 | 11 | Alain Prost | McLaren • Honda | 01:22.063 | 190.829 km/h | 35 | +00.102 |
| 4 | 16 | Ivan Capelli | March • Judd | 01:22.074 | 190.803 km/h | 33 | +00.113 |
| 5 | 27 | Michele Alboreto | Ferrari | 01:22.123 | 190.690 km/h | 65 | +00.162 |
| 6 | 19 | Alessandro Nannini | Benetton • Ford Cosworth | 01:22.563 | 189.673 km/h | 23 | +00.602 |
| 7 | 5 | Nigel Mansell | Williams • Judd | 01:22.581 | 189.632 km/h | 47 | +00.620 |
| 8 | 12 | Ayrton Senna | McLaren • Honda | 01:22.852 | 189.012 km/h | 61 | +00.891 |
| 9 | 36 | Alex Caffi | Dallara • Ford Cosworth | 01:22.960 | 188.766 km/h | 31 | +00.999 |
| 10 | 17 | Derek Warwick | Arrows • Megatron | 01:23.043 | 188.577 km/h | 43 | +01.082 |
| 11 | 15 | Mauricio Gugelmin | March • Judd | 01:23.138 | 188.362 km/h | 40 | +01.177 |
| 12 | 1 | Nelson Piquet | Lotus • Honda | 01:23.362 | 187.855 km/h | 33 | +01.401 |
| 13 | 21 | Nicola Larini | Osella | 01:23.715 | 187.063 km/h | 44 | +01.754 |
| 14 | 6 | Riccardo Patrese | Williams • Judd | 01:23.907 | 186.635 km/h | 26 | +01.946 |
| 15 | 23 | Pierluigi Martini | Minardi • Ford Cosworth | 01:23.918 | 186.611 km/h | 25 | +01.957 |
| 16 | 24 | Luis Perez-Sala | Minardi • Ford Cosworth | 01:24.301 | 185.763 km/h | 28 | +02.340 |
| 17 | 22 | Andrea de Cesaris | Rial • Ford Cosworth | 01:24.390 | 185.567 km/h | 10 | +02.429 |
| 18 | 29 | Yannick Dalmas | Lola • Ford Cosworth | 01:24.647 | 185.004 km/h | 15 | +02.686 |
| 19 | 14 | Philippe Streiff | AGS • Ford Cosworth | 01:24.785 | 184.702 km/h | 46 | +02.824 |
| 20 | 3 | Jonathan Palmer | Tyrrell • Ford Cosworth | 01:24.950 | 184.344 km/h | 42 | +02.989 |
| 21 | 25 | René Arnoux | Ligier • Judd | 01:24.954 | 184.335 km/h | 59 | +02.993 |
| 22 | 18 | Eddie Cheever | Arrows • Megatron | 01:25.073 | 184.077 km/h | 9 | +03.112 |
| 23 | 31 | Gabriele Tarquini | Coloni • Ford Cosworth | 01:25.291 | 183.607 km/h | 37 | +03.330 |
| 24 | 2 | Satoru Nakajima | Lotus • Honda | 01:26.094 | 181.894 km/h | 14 | +04.133 |
| 25 | 30 | Philippe Alliot | Lola • Ford Cosworth | 01:26.109 | 181.863 km/h | 6 | +04.148 |
| 26 | 26 | Stefan Johansson | Ligier • Judd | 01:26.153 | 181.770 km/h | 4 | +04.192 |