4. GRANDE PREMIO DE PORTUGAL - FASTEST LAPS
21 Oct 1984
Autódromo do Estoril, Portugal
| Pos. | No. | Driver | Team | Lap | Time |
|---|---|---|---|---|---|
| 1 | 8 | Niki LaudaLAU | McLaren TAG | 51 | 1:22.996 |
| 2 | 7 | Alain ProstPRO | McLaren TAG | 39 | 1:23.452 |
| 3 | 20 | Stefan JohanssonJOH | Toleman Hart | 51 | 1:24.053 |
| 4 | 27 | Michele AlboretoALB | Ferrari | 68 | 1:24.148 |
| 5 | 12 | Nigel MansellMAN | Lotus Renault | 47 | 1:24.267 |
| 6 | 1 | Nelson PiquetPIQ | Brabham BMW | 39 | 1:24.275 |
| 7 | 19 | Ayrton SennaSEN | Toleman Hart | 46 | 1:24.373 |
| 8 | 5 | Jacques LaffiteLAF | Williams Honda | 55 | 1:24.507 |
| 9 | 16 | Derek WarwickWAR | Renault | 20 | 1:25.309 |
| 10 | 15 | Patrick TambayTAM | Renault | 37 | 1:25.506 |
| 11 | 6 | Keke RosbergROS | Williams Honda | 37 | 1:25.667 |
| 12 | 11 | Elio de AngelisDEA | Lotus Renault | 45 | 1:25.680 |
| 13 | 28 | Rene ArnouxARN | Ferrari | 53 | 1:25.711 |
| 14 | 23 | Eddie CheeverCHE | Alfa Romeo | 33 | 1:26.020 |
| 15 | 22 | Riccardo PatresePAT | Alfa Romeo | 43 | 1:26.173 |
| 16 | 2 | Manfred WinkelhockWIN | Brabham BMW | 63 | 1:26.404 |
| 17 | 14 | Gerhard BergerBER | ATS BMW | 59 | 1:26.601 |
| 18 | 26 | Andrea de CesarisDEC | Ligier Renault | 36 | 1:26.806 |
| 19 | 33 | Philippe StreiffSTR | Renault | 43 | 1:26.874 |
| 20 | 30 | Jo GartnerGAR | Osella Alfa Romeo | 58 | 1:27.169 |
| 21 | 18 | Thierry BoutsenBOU | Arrows BMW | 24 | 1:27.725 |
| 22 | 21 | Mauro BaldiBAL | Spirit Ford | 48 | 1:27.772 |
| 23 | 24 | Piercarlo GhinzaniGHI | Osella Alfa Romeo | 42 | 1:28.410 |
| 24 | 17 | Marc SurerSUR | Arrows BMW | 7 | 1:28.635 |
| 25 | 25 | Francois HesnaultHES | Ligier Renault | 19 | 1:29.219 |
| 26 | 10 | Jonathan PalmerPAL | RAM Hart | 6 | 1:30.711 |
| 31 | 9 | Philippe AlliotALL | RAM Hart | 2 | 1:35.542 |