1986 AT&T Williams F1 Formula One statistics
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| Race # | Track | Driver | Start | Finish | Car # | Team | Chassis | Engine | Tyre | Qualifying Time | Laps | X Led | Laps Led | Status | Points |
| 1 | Jacarepagua | Nelson Piquet | 2 | 1 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:26.266 | 61 | 3 | 50 | 1:39:32.583 | 9 |
| 1 | Jacarepagua | Nigel Mansell | 3 | 25 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:26.749 | 0 | 0 | 0 | spun off | 0 |
| 2 | Jerez | Nigel Mansell | 3 | 2 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:22.576 | 72 | 1 | 23 | +0.014 | 6 |
| 2 | Jerez | Nelson Piquet | 2 | 13 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:22.431 | 39 | 0 | 0 | engine | 0 |
| 3 | Imola | Nelson Piquet | 2 | 2 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:25.569 | 60 | 1 | 28 | +7.645 | 6 |
| 3 | Imola | Nigel Mansell | 3 | 22 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:26.159 | 8 | 0 | 0 | engine | 0 |
| 4 | Monaco | Nigel Mansell | 2 | 4 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:23.047 | 78 | 0 | 0 | +71.402 | 3 |
| 4 | Monaco | Nelson Piquet | 11 | 7 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:25.287 | 77 | 0 | 0 | +1 lap | 0 |
| 5 | Spa-Francorchamps | Nigel Mansell | 5 | 1 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:54.582 | 43 | 1 | 20 | 1:27:57.925 | 9 |
| 5 | Spa-Francorchamps | Nelson Piquet | 1 | 19 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:54.331 | 16 | 1 | 16 | turbo | 0 |
| 6 | Montreal | Nigel Mansell | 1 | 1 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:24.118 | 69 | 3 | 63 | 1:42:26.415 | 9 |
| 6 | Montreal | Nelson Piquet | 3 | 3 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:24.384 | 69 | 0 | 0 | +36.262 | 4 |
| 7 | Detroit | Nigel Mansell | 2 | 5 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:38.839 | 62 | 1 | 5 | +1 lap | 2 |
| 7 | Detroit | Nelson Piquet | 3 | 15 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:39.076 | 41 | 1 | 9 | accident | 0 |
| 8 | Paul Ricard | Nigel Mansell | 2 | 1 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:06.755 | 80 | 3 | 64 | 1:37:19.272 | 9 |
| 8 | Paul Ricard | Nelson Piquet | 3 | 3 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:07.545 | 80 | 0 | 0 | +37.545 | 4 |
| 9 | Brands Hatch | Nigel Mansell | 2 | 1 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:07.399 | 75 | 1 | 53 | 1:30:38.471 | 9 |
| 9 | Brands Hatch | Nelson Piquet | 1 | 2 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:06.961 | 75 | 1 | 22 | +5.574 | 6 |
| 10 | Hockenheimring | Nelson Piquet | 5 | 1 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:42.545 | 44 | 3 | 22 | 1:22:08.263 | 9 |
| 10 | Hockenheimring | Nigel Mansell | 6 | 3 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:42.696 | 44 | 0 | 0 | +44.580 | 4 |
| 11 | Hungaroring | Nelson Piquet | 2 | 1 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:29.785 | 76 | 2 | 44 | 2:00:34.508 | 9 |
| 11 | Hungaroring | Nigel Mansell | 4 | 3 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:30.072 | 75 | 0 | 0 | +1 lap | 4 |
| 12 | Osterreichring | Nigel Mansell | 6 | 12 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:24.635 | 32 | 1 | 3 | halfshaft | 0 |
| 12 | Osterreichring | Nelson Piquet | 7 | 13 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:24.697 | 29 | 0 | 0 | engine | 0 |
| 13 | Monza | Nelson Piquet | 6 | 1 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:25.137 | 51 | 1 | 14 | 1:17:42.889 | 9 |
| 13 | Monza | Nigel Mansell | 3 | 2 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:24.882 | 51 | 2 | 29 | +9.828 | 6 |
| 14 | Estoril | Nigel Mansell | 2 | 1 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:17.489 | 70 | 1 | 70 | 1:37:21.900 | 9 |
| 14 | Estoril | Nelson Piquet | 6 | 3 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:18.180 | 70 | 0 | 0 | +49.274 | 4 |
| 15 | Mexico City | Nelson Piquet | 2 | 4 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:17.279 | 67 | 1 | 31 | +1 lap | 3 |
| 15 | Mexico City | Nigel Mansell | 3 | 5 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:17.514 | 67 | 0 | 0 | +1 lap | 0 |
| 16 | Adelaide | Nelson Piquet | 2 | 2 | 6 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:18.714 | 82 | 2 | 8 | +4.205 | 6 |
| 16 | Adelaide | Nigel Mansell | 1 | 12 | 5 | Canon Williams Honda | Williams FW11 | Honda RA166E | Goodyear | 1:18.403 | 63 | 0 | 0 | tyre | 0 |
