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1990
Machine: McLaren MP4/5B / Tyre: GOOD YEAR / Car No.27

Last off-season Alain Prost left the jointed number one drivers' system of McLaren with a term of reproach and transferred to Ferrari, then the battle between two surprising pilots got bogged down beyond retrieval. McLaren had more competitive machine than Ferrari, however, Ferrari also succeeded in improving their car parallel to McLaren, therefore they entered into intense competition for not only the title of the world championship but also their pride.
The terrible Japan GP(Ref. Victory crash) again. Turning face about their posion last season, Senna topped the championship point standings as of Spain GP, however, Prost also had made efforts to come up to Senna within his grasp. Japan GP would be a decisive race to decide the outcome of the season championship. That race ended all too soon in opening lap. Right after two drivers leaving the front-row grid, Ayrton Senna who was overtook by Prost rushed into the side of Prost's machine at the first corner of Suzuka. Both went off the track and got off the machine soon. Senna was easily the most successful in the world champion. He was suffering horribly from being blamed that he revenged himself on his enemy with an intentional accident at the 1st corner.
Since this season Senna's driving skill had been distinguished as God liked him, accepting his ability that nobody would had reached his area even Prost if he would would had ridden the same car as Senna.
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| Rd. | Date | GP | Machine | Engine | Qualify | Final | Notes |
| 1 | 3/11 | America | McLaren MP4/5B | Honda RA100E | 5 | 1 | |
| 2 | 3/25 | Brazil | ↑ | ↑ | 1 | 3 | |
| 3 | 5/13 | San Marino | ↑ | ↑ | 1 | R | Rear wheel |
| 4 | 5/27 | Monaco | ↑ | ↑ | 1 | 1 | |
| 5 | 6/10 | Canadaa | ↑ | ↑ | 1 | 1 | |
| 6 | 6/24 | Mexico | ↑ | ↑ | 3 | 20 | Puncture |
| 7 | 7/8 | France | ↑ | ↑ | 3 | 3 | |
| 8 | 7/15 | UK | ↑ | ↑ | 2 | 3 | |
| 9 | 7/29 | Germany | ↑ | ↑ | 1 | 1 | |
| 10 | 8/12 | Hungary | ↑ | ↑ | 4 | 2 | |
| 11 | 8/26 | Belgium | ↑ | ↑ | 1 | 1 | |
| 12 | 9/9 | Italy | ↑ | ↑ | 1 | 1 | |
| 13 | 9/23 | Portugal | ↑ | ↑ | 3 | 2 | |
| 14 | 9/30 | Spain | ↑ | ↑ | 1 | R | Radiator broken |
| 15 | 10/21 | Japan | ↑ | ↑ | 1 | R | Collision with Prost |
| 16 | 11/4 | Australia | ↑ | ↑ | 1 | R | Accident |
| World Championship Classification: | WINNER with 78 points |
| Number of races lead: | 14 |
| Number of laps lead: | 556 laps(52.85%) |
| Number of kilometers lead: | 2,536 |
| Points per race, average: | 4.875 |
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