| «1990-13» | Portugal Grand Prix - XIX Grande Premio de Portugal |
| 1990-09-23 | Estoril - Autódromo Fernanda Pires da Silva - 61 laps × 4.35 km : 265.35 km |
| Pos | Grid | Car | Driver | Constructor | Q1 | Q2 | Best | Gap | Interval |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | Nigel Mansell | Ferrari | 01:14.861 | 01:13.557 | 01:13.557 | 212.896 km/h | |
| 2 | 2 | 1 | Alain Prost | Ferrari | 01:14.530 | 01:13.595 | 01:13.595 | +00.038 (+0.052%) | +00.038 |
| 3 | 3 | 27 | Ayrton Senna | McLaren • Honda | 01:14.246 | 01:13.601 | 01:13.601 | +00.044 (+0.060%) | +00.006 |
| 4 | 4 | 28 | Gerhard Berger | McLaren • Honda | 01:14.552 | 01:14.292 | 01:14.292 | +00.735 (+0.999%) | +00.691 |
| 5 | 5 | 6 | Riccardo Patrese | Williams • Renault | 01:15.539 | 01:14.723 | 01:14.723 | +01.166 (+1.585%) | +00.431 |
| 6 | 6 | 20 | Nelson Piquet | Benetton • Ford Cosworth | 01:15.542 | 01:14.728 | 01:14.728 | +01.171 (+1.592%) | +00.005 |
| 7 | 7 | 5 | Thierry Boutsen | Williams • Renault | 01:15.646 | 01:14.934 | 01:14.934 | +01.377 (+1.872%) | +00.206 |
| 8 | 8 | 4 | Jean Alesi | Tyrrell • Ford Cosworth | 01:16.092 | 01:15.122 | 01:15.122 | +01.565 (+2.128%) | +00.188 |
| 9 | 9 | 19 | Alessandro Nannini | Benetton • Ford Cosworth | 01:16.123 | 01:15.411 | 01:15.411 | +01.854 (+2.520%) | +00.289 |
| 10 | 10 | 29 | Eric Bernard | Lola • Lamborghini | 01:16.477 | 01:15.673 | 01:15.673 | +02.116 (+2.877%) | +00.262 |
| 11 | 11 | 30 | Aguri Suzuki | Lola • Lamborghini | 01:17.189 | 01:16.012 | 01:16.012 | +02.455 (+3.338%) | +00.339 |
| 12 | 12 | 16 | Ivan Capelli | Leyton House • Judd | 01:18.242 | 01:16.284 | 01:16.284 | +02.727 (+3.707%) | +00.272 |
| 13 | 13 | 21 | Emanuele Pirro | Dallara • Ford Cosworth | 01:17.653 | 01:16.290 | 01:16.290 | +02.733 (+3.715%) | +00.006 |
| 14 | 14 | 15 | Mauricio Gugelmin | Leyton House • Judd | 01:17.569 | 01:16.296 | 01:16.296 | +02.739 (+3.724%) | +00.006 |
| 15 | 15 | 12 | Martin Donnelly | Lotus • Lamborghini | 01:17.414 | 01:16.762 | 01:16.762 | +03.205 (+4.357%) | +00.466 |
| 16 | 16 | 23 | Pierluigi Martini | Minardi • Ford Cosworth | 01:17.045 | 01:16.795 | 01:16.795 | +03.238 (+4.402%) | +00.033 |
| 17 | 17 | 10 | Alex Caffi | Arrows • Ford Cosworth | 01:18.725 | 01:16.946 | 01:16.946 | +03.389 (+4.607%) | +00.151 |
| 18 | 18 | 22 | Andrea de Cesaris | Dallara • Ford Cosworth | 01:17.252 | 01:17.066 | 01:17.066 | +03.509 (+4.770%) | +00.120 |
| 19 | 19 | 9 | Michele Alboreto | Arrows • Ford Cosworth | 01:18.630 | 01:17.081 | 01:17.081 | +03.524 (+4.791%) | +00.015 |
| 20 | 3 | Satoru Nakajima | Tyrrell • Ford Cosworth | 01:17.097 | 01:17.097 | +03.540 (+4.813%) | +00.016 | ||
| 21 | 20 | 26 | Philippe Alliot | Ligier • Ford Cosworth | 01:17.330 | 01:17.120 | 01:17.120 | +03.563 (+4.844%) | +00.023 |
| 22 | 21 | 11 | Derek Warwick | Lotus • Lamborghini | 01:17.904 | 01:17.259 | 01:17.259 | +03.702 (+5.033%) | +00.139 |
| 23 | 22 | 25 | Nicola Larini | Ligier • Ford Cosworth | 01:18.958 | 01:17.269 | 01:17.269 | +03.712 (+5.046%) | +00.010 |
| 24 | 23 | 8 | Stefano Modena | Brabham • Judd | 01:17.962 | 01:17.341 | 01:17.341 | +03.784 (+5.144%) | +00.072 |
| 25 | 24 | 18 | Yannick Dalmas | AGS • Ford Cosworth | 01:18.581 | 01:17.621 | 01:17.621 | +04.064 (+5.525%) | +00.280 |
| 26 | 25 | 7 | David Brabham | Brabham • Judd | 01:18.967 | 01:17.715 | 01:17.715 | +04.158 (+5.653%) | +00.094 |
| 27 | 14 | Olivier Grouillard | Osella • Ford Cosworth | 01:18.512 | 01:17.775 | 01:17.775 | +04.218 (+5.734%) | +00.060 | |
| 28 | 24 | Paolo Barilla | Minardi • Ford Cosworth | 01:18.669 | 01:18.280 | 01:18.280 | +04.723 (+6.421%) | +00.505 | |
| 29 | 17 | Gabriele Tarquini | AGS • Ford Cosworth | 01:20.226 | 01:18.815 | 01:18.815 | +05.258 (+7.148%) | +00.535 | |
| 30 | 31 | Bertrand Gachot | Coloni • Ford Cosworth | 01:20.662 | 01:20.516 | 01:20.516 | +06.959 (+9.461%) | +01.701 | |
| 31 | 33 | Roberto Moreno | Eurobrun • Judd | 01:21.188 | 01:21.188 | +07.631 (+10.374%) | +00.672 | ||
| 32 | 34 | Claudio Langes | Eurobrun • Judd | 01:23.447 | 01:23.447 | +09.890 (+13.445%) | +02.259 | ||
| 33 | 39 | Bruno Giacomelli | Life • Judd |