23, whereupon he stalled his engine and was out of the race. A slowing Prost waved again on lap 31 as he passed the start/finish line. The red flag to stop the race was shown at the end of the 32nd lap after clerk of the course Jacky Ickx decided that conditions were too poor for the race to continue. Senna passed Prost's slowing McLaren before the finish line, but according to the rules, the positions counted are those from the last lap completed by every driver – lap 31, at which point Prost was still leading. The stoppage was controversial, as it benefited Prost with a Porsche-designed engine, and was made by Ickx, the lead driver with the factory run Rothmans Porsche team in sports car racing. Ickx was suspended from his race control duties for not consulting with the stewards over his decision before making it. Had the race been allowed to continue until 75% of the laps, full points would have been awarded and Prost could have had six points from a second place (or nine for a win) instead of 4.5 points from the half-race win. Prost eventually lost the championship to Niki Lauda by only half a point. Stefan Bellof, running in the only naturally aspirated car in the race, finished third and had been closing on both Senna and Prost. Bellof had qualified 20th and last in his Tyrrell 012-Cosworth. His drive from last to third was a stand-out achievement in his short career, although he was later disqualified due to weight restrictions broken by Tyrrell. His drive led to negotiations with Ferrari for a drive for 1986 alongside Michele Alboreto, as René Arnoux was under contract in 1985. The Tyrrell team's results were erased later in the season due to weight infringements, meaning that Bellof was stripped of his podium finish, with his place being taken by René Arnoux. It would prove to be Bellof's only podium visit during his Formula One career. This was the first time that Ayrton Senna had set a Formula One fastest lap. It was also Toleman's second and final fastest lap in Formula One (Derek Warwick had set the team's only other fastest lap during the 1982 Dutch Grand Prix at Zandvoort). Classification Qualifying *Positions with a pink background indicate drivers that failed to qualify Race Stefan Bellof originally finished 3rd in his Tyrrell but was later