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| Date | Sunday 23 September 1990 |
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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 61 laps |
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| Championship | World Championship |
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| Race number | #13 of 16 in 1990
#497 (of all time) |
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| Laps | 61 |
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| Circuit Perimeter | 4350 m |
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| Race Distance | 4350 × 61 = 265.350 km |
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| Grid Format | 2-2-2-2 (staggered) |
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| Pole Position | Left |
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| First Corner | Right |
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| Track Direction | Clockwise |
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| Weather | Partially cloudy, Mild, Dry |
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| Entries | 33 |
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| Qualifiers | 26 |
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| Finishers | 15 |
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| Debutants | Ligier JS33C (Car Model) |
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| Records Broken |
1. Most 9th Place Finishes –  Arrows (33),
2. Most 10th Place Finishes in a Season –  Nicola Larini (4),
3. Most Failures to Pre-Qualify – EuroBrun (39),
4. Most 6th Place Qualifications –  Nélson Piquet (15)
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| Records Extended |
1. Most Retirements – Lotus (523),
2. Most Podium Finishes – Ferrari (351),
3. Most Drivers' Championship Points Scores – Ferrari (547),
4. Most Constructors' Championship Points Scores – Ferrari (415),
5. Most Constructors' Championship Points Scores –  Alain Prost (106),
6. Most Drivers' Championship Points Scores – Alain Prost (106),
7. Most Podium Finishes – Alain Prost (87),
8. Most Race Wins – Ferrari (103),
9. Most 3rd Place Finishes – Ferrari (111),
10. Most Races Led – Ferrari (248),
11. Most Laps Led – Ferrari (6759),
12. Most Race Entries – Lotus (1198),
13. Most Race Entries – Riccardo Patrese (206),
14. Most Poles – Ferrari (110),
15. Most 2nd Place Qualifications – Ferrari (111),
16. Most 2nd Place Qualifications – Alain Prost (45),
17. Most 20th Place Qualifications – Philippe Alliot (12)
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