Race Result
| GP n. 419 - 19/10/1985 - Grand Prix of South-Africa Kyalami Grand Prix Circuit |
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| Winner: | Nigel Mansell / Williams-Honda - 1:28'22.866 | ||||||
| Pole Position: | Nigel Mansell / Williams-Honda - 1:02.366 | ||||||
| Fastest Lap: | Keke Rosberg / Williams-Honda - 1:08.149 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 5 |  Nigel Mansell |
Williams-Honda | 75 | 1:28'22.866 | 1 | 9 |
| 2 | 6 |  Keke Rosberg |
Williams-Honda | 75 | +7.572 | 3 | 6 |
| 3 | 2 |  Alain Prost |
McLaren-TAG | 74 | + 1 lap | 9 | 4 |
| 4 | 28 |  Stefan Johansson |
Ferrari | 74 | + 1 lap | 16 | 3 |
| 5 | 17 |  Gerhard Berger |
Arrows-BMW | 74 | + 1 lap | 11 | 2 |
| 6 | 18 |  Thierry Boutsen |
Arrows-BMW | 74 | + 1 lap | 10 | 1 |
| 7 | 3 | Martin Brundle |
Tyrrell-Renault | 73 | + 2 laps | 17 | 0 |
| Ret | 11 |  Elio de Angelis |
Lotus-Renault | 52 | engine | 6 | 0 |
| Ret | 29 | Pierluigi Martini |
Minardi-Motori Moderni | 45 | radiator | 20 | 0 |
| Ret | 1 | Niki Lauda |
McLaren-TAG | 37 | turbo | 8 | 0 |
| Ret | 4 | Philippe Streiff |
Tyrrell-Renault | 16 | accident | 19 | 0 |
| Ret | 27 | Michele Alboreto |
Ferrari | 8 | turbo | 15 | 0 |
| Ret | 12 |  Ayrton Senna |
Lotus-Renault | 8 | engine | 4 | 0 |
| Ret | 7 | Nelson Piquet |
Brabham-BMW | 6 | engine | 2 | 0 |
| Ret | 20 | Piercarlo Ghinzani |
Toleman-Hart | 4 | engine | 13 | 0 |
| Ret | 8 |  Marc Surer |
Brabham-BMW | 3 | engine | 5 | 0 |
| Ret | 19 | Teo Fabi |
Toleman-Hart | 3 | engine | 7 | 0 |
| Ret | 24 |  Huub Rothengatter |
Osella-Alfa Romeo | 1 | electrical | 21 | 0 |
| Ret | 22 | Riccardo Patrese |
Alfa Romeo | 0 | accident | 12 | 0 |
| Ret | 23 |  Eddie Cheever |
Alfa Romeo | 0 | accident | 14 | 0 |
| Dns | 33 |  Alan Jones |
Lola-Hart | 0 | unwell | 18 | 0 |