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| Date | Sunday 21 September 1986 |
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| Start time | 14:00 |
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| Event |  Portuguese GP |
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| Circuit | Estoril |
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| Event Format | Race of 70 laps |
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| Championship | World Championship |
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| Race number | #14 of 16 in 1986
#434 (of all time) |
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| Laps | 70 |
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| Circuit Perimeter | 4350 m |
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| Race Distance | 4350 × 70 = 304.500 km |
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| Grid Format | 2-2-2-2 (staggered) |
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| Pole Position | Right |
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| First Corner | Right |
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| Track Direction | Clockwise |
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| Weather | Cloudy, Mild, Dry |
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| Entries | 27 |
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| Qualifiers | 27 |
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| Finishers | 13 |
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| Debutants | None |
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| Milestones | Car 21 – 200th Race Entry (Car Number)
 Lola – 100th Race Entry (Car Manufacturer)
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| Records Broken |
1. Most 5th Place Finishes –  Ferrari (54),
2. Most Retirements in a Season – Alessandro Nannini, Andrea de Cesaris (13),
3. Most Fastest Laps in a Season – Williams (9),
4. Most 2nd Place Qualifications in a Season – Williams (9)
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| Records Extended |
1. Most Drivers' Championship Points Scores – Ferrari (494),
2. Most Constructors' Championship Points Scores – Ferrari (362),
3. Most Retirements – Riccardo Patrese (87),
4. Most 6th Place Finishes – Ferrari (57),
5. Most 9th Place Finishes – Lotus (30),
6. Most Race Entries – Lotus (1072),
7. Most Poles – Lotus (105),
8. Most 8th Place Qualifications – Ferrari (61)
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