Race Result
| GP n. 404 - 21/10/1984 - Grand Prix of Portugal Autodromo do Estoril |
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| Winner: | Alain Prost / McLaren-TAG - 1:41'11.753 | ||||||
| Pole Position: | Nelson Piquet / Brabham-BMW - 1:21.703 | ||||||
| Fastest Lap: | Niki Lauda / McLaren-TAG - 1:22.996 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 7 |  Alain Prost |
McLaren-TAG | 70 | 1:41'11.753 | 2 | 9 |
| 2 | 8 |  Niki Lauda |
McLaren-TAG | 70 | +13.425 | 11 | 6 |
| 3 | 19 |  Ayrton Senna |
Toleman-Hart | 70 | +20.042 | 3 | 4 |
| 4 | 27 |  Michele Alboreto |
Ferrari | 70 | +20.317 | 8 | 3 |
| 5 | 11 | Elio de Angelis |
Lotus-Renault | 70 | + 1'32.169 | 5 | 2 |
| 6 | 1 | Nelson Piquet |
Brabham-BMW | 69 | + 1 lap | 1 | 1 |
| 7 | 15 | Patrick Tambay |
Renault | 69 | + 1 lap | 7 | 0 |
| 8 | 22 | Riccardo Patrese |
Alfa Romeo | 69 | + 1 lap | 12 | 0 |
| 9 | 28 | Rene Arnoux |
Ferrari | 69 | + 1 lap | 17 | 0 |
| 10 | 2 |  Manfred Winkelhock |
Brabham-BMW | 69 | + 1 lap | 19 | 0 |
| 11 | 20 |  Stefan Johansson |
Toleman-Hart | 69 | + 1 lap | 10 | 0 |
| 12 | 26 | Andrea de Cesaris |
Ligier-Renault | 69 | + 1 lap | 20 | 0 |
| 13 | 14 | Gerhard Berger |
ATS-BMW | 68 | + 2 laps | 23 | 0 |
| 14 | 5 | Jacques Laffite |
Williams-Honda | 67 | + 3 laps | 15 | 0 |
| 15 | 21 | Mauro Baldi |
Spirit-Hart | 66 | + 4 laps | 25 | 0 |
| 16 | 30 | Jo Gartner |
Osella-Alfa Romeo | 65 | out of fuel | 24 | 0 |
| 17 | 23 |  Eddie Cheever |
Alfa Romeo | 64 | + 6 laps | 14 | 0 |
| Ret | 24 | Piercarlo Ghinzani |
Osella-Alfa Romeo | 60 | engine | 22 | 0 |
| Ret | 12 |  Nigel Mansell |
Lotus-Renault | 52 | spun off | 6 | 0 |
| Ret | 16 | Derek Warwick |
Renault | 51 | gear box | 9 | 0 |
| Ret | 33 | Philippe Streiff |
Renault | 48 | transmission | 13 | 0 |
| Ret | 6 |  Keke Rosberg |
Williams-Honda | 39 | engine | 4 | 0 |
| Ret | 25 | Francois Hesnault |
Ligier-Renault | 31 | electrical | 21 | 0 |
| Ret | 18 |  Thierry Boutsen |
Arrows-BMW | 24 | transmission | 18 | 0 |
| Ret | 10 | Jonathan Palmer |
RAM-Hart | 19 | gear box | 26 | 0 |
| Ret | 17 |  Marc Surer |
Arrows-BMW | 8 | electrical | 16 | 0 |
| Ret | 9 | Philippe Alliot |
RAM-Hart | 2 | engine | 27 | 0 |