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The 1986 Australian Grand Prix was a Formula One motor race held on 26 October 1986 at the Adelaide Street Circuit, Adelaide, Australia. It was the last of 16 races in the 1986 Formula One season, and decided a three-way tussle for the Drivers' Championship. The drivers in contention for the title were; Nigel Mansell, Nelson Piquet, both of whom were racing for the Williams-Honda team, and McLaren's Alain Prost. Mansell took pole position for the race, but a poor start off the grid enabled team-mate Piquet, Ayrton Senna and Keke Rosberg to overtake him and demote him to fourth by the end of the first lap. A few laps into the race, Finland's Keke Rosberg, in his final Grand Prix, took the lead from Piquet. However, the Finn retired with a puncture on lap 63, handing the lead back to Piquet and elevating Mansell into third place, which would have been sufficient for the Englishman to secure the championship. One lap later, Mansell's race ended as his left-rear tyre exploded on the main straight with 19 laps remaining. The title was then between Piquet and Prost with the Frenchman needing to finish ahead of the Brazilian to successfully defend his title. Following the tyre failures of Rosberg and Mansell, the Williams team called Piquet in for a precautionary tyre change leaving him 15 seconds behind. He made a late charge to close the gap to 4.2 seconds but Prost took victory to win his second of four titles. It was not until the 2007 Brazilian Grand Prix that there were again three possible drivers' title contenders entering the final race of the season. ==Background== Coming into the race, three drivers had a chance of winning the title. British driver Nigel Mansell was the leader; six points behind was defending champion Alain Prost, and one point behind Prost was Mansell's teammate at Williams, Nelson Piquet. In fourth was Ayrton Senna, who was guaranteed to finish in that position regardless of what happened. Prost was aiming to become the first driver since Jack Brabham in and to win back-to-back World Drivers' Championships. The Williams cars of Mansell and Piquet were far superior in speed to Prost's McLaren. However, Prost's consistency had seen him accumulate points all year, while the Williams pair battled with one another and their mind games eroded what would have been a dominant season for the team. To win the championship Mansell needed either third position or higher, or for both Prost and Piquet to finish in second place or lower. For Prost or Piquet to win the championship, they would have to win the race, and see Mansell finish in fourth position or lower. Unlike the Drivers' Championship, the Constructors' Championship had already been decided in Williams' favour, as they had a 48-point advantage over McLaren. McLaren's place as runners-up was secured, as they were 30 points ahead of third placed Lotus. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「1986 Australian Grand Prix」の詳細全文を読む スポンサード リンク
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