| «1984-16» | Portugal Grand Prix - XIII Grande Premio de Portugal |
| 1984-10-21 | Estoril - Autódromo Fernanda Pires da Silva - 70 laps × 4.35 km : 304.5 km |
| Pos | Grid | Car | Driver | Constructor | Q1 | Q2 | Best | Gap | Interval |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | Nelson Piquet | Brabham • BMW | 01:30.889 | 01:21.703 | 01:21.703 | 191.670 km/h | |
| 2 | 2 | 7 | Alain Prost | McLaren • TAG Porsche | 01:28.276 | 01:21.774 | 01:21.774 | +00.071 (+0.087%) | +00.071 |
| 3 | 3 | 19 | Ayrton Senna | Toleman • Hart | 01:30.077 | 01:21.936 | 01:21.936 | +00.233 (+0.285%) | +00.162 |
| 4 | 4 | 6 | Keke Rosberg | Williams • Honda | 01:32.269 | 01:22.049 | 01:22.049 | +00.346 (+0.423%) | +00.113 |
| 5 | 5 | 11 | Elio de Angelis | Lotus • Renault | 01:28.428 | 01:22.291 | 01:22.291 | +00.588 (+0.720%) | +00.242 |
| 6 | 6 | 12 | Nigel Mansell | Lotus • Renault | 01:32.986 | 01:22.319 | 01:22.319 | +00.616 (+0.754%) | +00.028 |
| 7 | 7 | 15 | Patrick Tambay | Renault | 01:29.409 | 01:22.583 | 01:22.583 | +00.880 (+1.077%) | +00.264 |
| 8 | 8 | 27 | Michele Alboreto | Ferrari | 01:31.192 | 01:22.686 | 01:22.686 | +00.983 (+1.203%) | +00.103 |
| 9 | 9 | 16 | Derek Warwick | Renault | 01:35.913 | 01:22.801 | 01:22.801 | +01.098 (+1.344%) | +00.115 |
| 10 | 10 | 20 | Stefan Johansson | Toleman • Hart | 01:28.991 | 01:22.942 | 01:22.942 | +01.239 (+1.516%) | +00.141 |
| 11 | 11 | 8 | Niki Lauda | McLaren • TAG Porsche | 01:28.837 | 01:23.183 | 01:23.183 | +01.480 (+1.811%) | +00.241 |
| 12 | 12 | 22 | Riccardo Patrese | Alfa Romeo | 01:37.154 | 01:24.048 | 01:24.048 | +02.345 (+2.870%) | +00.865 |
| 13 | 13 | 33 | Philippe Streiff | Renault | 01:37.280 | 01:24.089 | 01:24.089 | +02.386 (+2.920%) | +00.041 |
| 14 | 14 | 23 | Eddie Cheever | Alfa Romeo | 01:34.809 | 01:24.235 | 01:24.235 | +02.532 (+3.099%) | +00.146 |
| 15 | 15 | 5 | Jacques Laffite | Williams • Honda | 01:39.696 | 01:24.437 | 01:24.437 | +02.734 (+3.346%) | +00.202 |
| 16 | 16 | 17 | Marc Surer | Arrows • BMW | 01:34.003 | 01:24.688 | 01:24.688 | +02.985 (+3.653%) | +00.251 |
| 17 | 17 | 28 | René Arnoux | Ferrari | 01:36.634 | 01:24.848 | 01:24.848 | +03.145 (+3.849%) | +00.160 |
| 18 | 18 | 18 | Thierry Boutsen | Arrows • BMW | 01:32.530 | 01:25.115 | 01:25.115 | +03.412 (+4.176%) | +00.267 |
| 19 | 19 | 2 | Manfred Winkelhock | Brabham • BMW | 01:25.289 | 01:25.289 | 01:25.289 | +03.586 (+4.389%) | +00.174 |
| 20 | 20 | 26 | Andrea de Cesaris | Ligier • Renault | 01:33.398 | 01:26.082 | 01:26.082 | +04.379 (+5.360%) | +00.793 |
| 21 | 21 | 25 | François Hesnault | Ligier • Renault | 01:34.233 | 01:26.701 | 01:26.701 | +04.998 (+6.117%) | +00.619 |
| 22 | 22 | 24 | Piercarlo Ghinzani | Osella • Alfa Romeo | 01:31.336 | 01:26.840 | 01:26.840 | +05.137 (+6.287%) | +00.139 |
| 23 | 23 | 14 | Gerhard Berger | ATS • BMW | 01:44.966 | 01:28.106 | 01:28.106 | +06.403 (+7.837%) | +01.266 |
| 24 | 24 | 30 | Jo Gartner | Osella • Alfa Romeo | 01:33.540 | 01:28.229 | 01:28.229 | +06.526 (+7.987%) | +00.123 |
| 25 | 25 | 21 | Mauro Baldi | Spirit • Hart | 01:36.483 | 01:29.001 | 01:29.001 | +07.298 (+8.932%) | +00.772 |
| 26 | 26 | 10 | Jonathan Palmer | RAM • Hart | 01:40.344 | 01:29.397 | 01:29.397 | +07.694 (+9.417%) | +00.396 |
| 27 | 27 | 9 | Philippe Alliot | RAM • Hart | 01:34.839 | 01:30.406 | 01:30.406 | +08.703 (+10.652%) | +01.009 |