Kyalami · 19 October 1985
Nigel Mansell won the 1985 South African Grand Prix for Williams from 1st on the grid, 7.572s ahead of Keke Rosberg. Stefan Johansson gained the most places, from 16th on the grid to 4th.
| Pos | Team | Points Breakdown | Pts | |
|---|---|---|---|---|
| 1 | Williams Mansell 9 + Rosberg 6 | Mansell 9 + Rosberg 6 | 15 | |
| 2 | McLaren Prost 4 + Lauda 0 | Prost 4 + Lauda 0 | 4 | |
| 3 | Ferrari Johansson 3 + Alboreto 0 | Johansson 3 + Alboreto 0 | 3 | |
| 4 | Arrows Berger 2 + Boutsen 1 | Berger 2 + Boutsen 1 | 3 | |
| 5 | Tyrrell Brundle 0 + Streiff 0 | Brundle 0 + Streiff 0 | 0 | |
| 6 | Team Lotus de Angelis 0 + Senna 0 | de Angelis 0 + Senna 0 | 0 | |
| 7 | Minardi Martini 0 | Martini 0 | 0 | |
| 8 | Brabham Piquet 0 + Surer 0 | Piquet 0 + Surer 0 | 0 | |
| 9 | Toleman Ghinzani 0 + Fabi 0 | Ghinzani 0 + Fabi 0 | 0 | |
| 10 | Osella Rothengatter 0 | Rothengatter 0 | 0 | |
| 11 | Alfa Romeo Patrese 0 + Cheever 0 | Patrese 0 + Cheever 0 | 0 | |
| 12 | Lola Jones 0 | Jones 0 | 0 |
| Pos | Driver | Team | Race time / Gap | Laps | Stops | Pts | |
|---|---|---|---|---|---|---|---|
| 1 | Nigel Mansell Williams | Williams | 1:28:22.866 | 75 | — | 9 | |
| 2 | Keke Rosberg Williams | Williams | +7.572s | 75 | — | 6 | |
| 3 | Alain Prost McLaren | McLaren | +1 Lap | 74 | — | 4 | |
| 4 | Stefan Johansson Ferrari | Ferrari | +1 Lap | 74 | — | 3 | |
| 5 | Gerhard Berger Arrows | Arrows | +1 Lap | 74 | — | 2 | |
| 6 | Thierry Boutsen Arrows | Arrows | +1 Lap | 74 | — | 1 | |
| 7 | Martin Brundle Tyrrell | Tyrrell | +2 Laps | 73 | — | — | |
| DNF | Elio de Angelis Team Lotus | Team Lotus | DNF Engine | 52 | — | — | |
| DNF | Pierluigi Martini Minardi | Minardi | DNF Radiator | 45 | — | — | |
| DNF | Niki Lauda McLaren | McLaren | DNF Turbo | 37 | — | — | |
| DNF | Philippe Streiff Tyrrell | Tyrrell | DNF Accident | 16 | — | — | |
| DNF | Ayrton Senna Team Lotus | Team Lotus | DNF Engine | 8 | — | — | |
| DNF | Michele Alboreto Ferrari | Ferrari | DNF Turbo | 8 | — | — | |
| DNF | Nelson Piquet Brabham | Brabham | DNF Engine | 6 | — | — | |
| DNF | Piercarlo Ghinzani Toleman | Toleman | DNF Engine | 4 | — | — | |
| DNF | Teo Fabi Toleman | Toleman | DNF Engine | 3 | — | — | |
| DNF | Marc Surer Brabham | Brabham | DNF Engine | 3 | — | — | |
| DNF | Huub Rothengatter Osella | Osella | DNF Electrical | 1 | — | — | |
| DNF | Riccardo Patrese Alfa Romeo | Alfa Romeo | DNF Accident | 0 | — | — | |
| DNF | Eddie Cheever Alfa Romeo | Alfa Romeo | DNF Accident | 0 | — | — | |
| DNS | Alan Jones Lola | Lola | DNS Driver unwell | 0 | — | — |