Phoenix Grand Prix Circuit
Grand Prix of USA |
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| Pos | No | Driver | Car-engine | Time/Delay | Reason |
| 1 | 1 | Ayrton Senna | McLaren MP4/6-Honda | 2:00'47.828 | - |
| 2 | 27 | Alain Prost | Ferrari 642 | +16.322 | - |
| 3 | 20 | Nelson Piquet | Benetton B190B/Ford | +17.376 | - |
| 4 | 4 | Stefano Modena | Tyrrell 020/Honda | +25.409 | - |
| 5 | 3 | Satoru Nakajima | Tyrrell 020/Honda | +1 lap | - |
| 6 | 30 | Aguri Suzuki | Lola LC91/Ford | +2 laps | - |
| 7 | 34 | Nicola Larini | Lamborghini 291 | +3 laps | - |
| 8 | 17 | Gabriele Tarquini | AGS JH25B/Ford | +4 laps | - |
| 9 | 23 | Pierluigi Martini | Minardi M191/Ferrari | 75 laps | Engine |
| 10 | 32 | Bertrand Gachot | Jordan 191/Ford | 75 laps | Engine |
| 11 | 7 | Martin Brundle | Brabham BT59Y/Yamaha | 8 laps | - |
| 12 | 28 | Jean Alesi | Ferrari 642 | 72 laps | Gearbox |
| | 11 | Mika Hakkinen | Lotus 102B/Judd | 59 laps | Engine |
| | 6 | Riccardo Patrese | Williams FW14/Renault | 49 laps | Gearbox |
| | 19 | Roberto Moreno | Benetton B190B/Ford | 49 laps | Accident |
| | 9 | Michele Alboreto | Footwork A11C/Porsche | 41 laps | Engine |
| | 16 | Ivan Capelli | Leyton House CG911/Ilmor | 40 laps | Gearbox |
| | 25 | Thierry Boutsen | Ligier JS35/Lamborghini | 40 laps | Engine |
| | 2 | Gerhard Berger | McLaren MP4/6-Honda | 36 laps | Fuel pump |
| | 5 | Nigel Mansell | Williams FW14/Renault | 35 laps | Gearbox |
| | 15 | Mauricio Gugelmin | Leyton House CG911/Ilmor | 34 laps | Gearbox |
| | 8 | Mark Blundell | Brabham BT59Y/Yamaha | 32 laps | Spun off |
| | 21 | Emanuele Pirro | Dallara 191/Judd | 16 laps | Gearbox |
| | 24 | Gianni Morbidelli | Minardi M191/Ferrari | 15 laps | Gearbox |
| | 22 | JJ Lehto | Dallara 191/Judd | 12 laps | Gearbox |
| | 29 | Eric Bernard | Lola LC91/Ford | 4 laps | Engine |
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| Lap Leaders |
| | Ayrton Senna | 1-81 |
| Pos | No | Driver | Car-engine | Time/Delay | Reason |
| 1 | 27 | Ayrton Senna | McLaren MP4/5B-Honda | 1:52'32.829 | - |
| 2 | 4 | Jean Alesi | Tyrrell 018/Ford | +8.685 | - |
| 3 | 5 | Thierry Boutsen | Williams FW13B/Renault | +54.080 | - |
| 4 | 20 | Nelson Piquet | Benetton 189/Ford | +1'08.358 | - |
| 5 | 8 | Stefano Modena | Brabham BT58/Judd | +1'09.503 | - |
| 6 | 3 | Satoru Nakajima | Tyrrell 018/Ford | +1 lap | - |
| 7 | 23 | Pierluigi Martini | Minardi M189/Ford | +1 lap | - |
| 8 | 29 | Eric Bernard | Lola LC89/Lamborghini | +1 lap | - |
| 9 | 6 | Riccardo Patrese | Williams FW13B/Renault | +1 lap | - |
| 10 | 9 | Michele Alboreto | Arrows A11B/Ford | +2 laps | - |
| 11 | 19 | Alessandro Nannini | Benetton B189/Ford | +2 laps | - |
| 12 | 10 | Bernd Schneider | Arrows A11B/Ford | +2 laps | - |
| 13 | 33 | Roberto Moreno | Euro Brun ER189B/Judd | +5 laps | - |
| 14 | 15 | Mauricio Gugelmin | Leyton House CG901A/Judd | +6 laps | - |
| | 24 | Paolo Barilla | Minardi M189/Ford | 54 laps | Physical |
| | 30 | Aguri Suzuki | Lola LC89/Lamborghini | 53 laps | Brakes |
| | 2 | Nigel Mansell | Ferrari 641 | 49 laps | Engine |
| | 28 | Gerhard Berger | McLaren MP4/5B-Honda | 44 laps | Clutch |
| | 7 | Gregor Foitek | Brabham BT58/Judd | 39 laps | Accident |
| | 14 | Olivier Grouillard | Osella FA1/Ford | 39 laps | Accident |
| | 22 | Andrea de Cesaris | Dallara 190/Ford | 25 laps | Engine |
| | 1 | Alain Prost | Ferrari 641 | 21 laps | Oil leak |
| | 16 | Ivan Capelli | Leyton House Cg901/Judd | 20 laps | Electrical |
| | 11 | Derek Warwick | Lotus 102/Lamborghini | 6 laps | Gearbox |
| | 25 | Nicola Larini | Ligier JS33B/Ford | 4 laps | Throttle |
| | 12 | Martin Donnelly | Lotus 102/Lamborghini | 0 laps | Gearbox |
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| Lap Leaders |
| | Jean Alesi | 1-34 |
| | Ayrton Senna | 35-72 |
| Pos | No | Driver | Car-engine | Time/Delay | Reason |
| 1 | 2 | Alain Prost | McLaren MP4/5-Honda | 2:01'33.133 | - |
| 2 | 6 | Riccardo Patrese | Williams FW12C/Renault | +39.696 | - |
| 3 | 10 | Eddie Cheever | Arrows A11/Ford | +43.210 | - |
| 4 | 38 | Christian Danner | Rial ARC02-89/Ford | +1 lap | - |
| 5 | 20 | Johnny Herbert | Benetton B188/Ford | +1 lap | - |
| 6 | 5 | Thierry Boutsen | Williams FW12C/Renault | +1 lap | - |
| 7 | 40 | Gabriele Tarquini | AGS JH23/Ford | 73 laps | Engine |
| 8 | 22 | Andrea de Cesaris | Dallara 189/Ford | +5 laps | - |
| 9 | 3 | Jonathan Palmer | Tyrrell 018/Ford | 69 laps | Fuel system |
| | 28 | Gerhard Berger | Ferrari 640 | 61 laps | Alternator |
| | 21 | Alex Caffi | Dallara 189/Ford | 52 laps | Accident |
| | 11 | Nelson Piquet | Lotus 101/Judd | 52 laps | Spun off |
| | 36 | Stefan Johansson | Onyx ORE-1/Ford | 50 laps | Suspension |
| | 24 | Luis Perez-Sala | Minardi M188B/Ford | 46 laps | Engine |
| | 1 | Ayrton Senna | McLaren MP4/5-Honda | 44 laps | Electrical |
| | 7 | Martin Brundle | Brabham BT58/Judd | 43 laps | Brakes |
| | 8 | Stefano Modena | Brabham BT58/Judd | 37 laps | Brakes |
| | 27 | Nigel Mansell | Ferrari 640 | 31 laps | Alternator |
| | 23 | Pierluigi Martini | Minardi 188B/Ford | 26 laps | Engine |
| | 12 | Satoru Nakajima | Lotus 101/Judd | 24 laps | Throttle |
| | 16 | Ivan Capelli | March CG891/Judd | 22 laps | Transmission |
| | 15 | Mauricio Gugelmin | March CG891/Judd | 20 laps | Brakes |
| | 4 | Michele Alboreto | Tyrrell 018/Ford | 17 laps | Gearbox |
| | 19 | Alessandro Nannini | Benetton B188/Ford | 10 laps | Physical |
| | 9 | Derek Warwick | Arrows A11/Ford | 7 laps | Accident |
| | 30 | Philippe Alliot | Lola LC89B/Lamborghini | 3 laps | Spun off |
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| Lap Leaders |
| | Ayrton Senna | 1-33 |
| | Alain Prost | 34-75 |
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