slightly banked and the track had a very abrasive surface. Due to the FIA calendar, which invariably had the Brazilian GP at the beginning of the season thus in the Southern hemisphere summer and the tropical weather of Rio, most races were held under very high temperatures and high humidity. Due to all of those circumstances, Grands Prix at Rio were highly demanding and most drivers who won it were exhausted in the end. In 1981, Carlos Reutemann disobeyed team orders to let his teammate Alan Jones by and took the victory; the following year Piquet finished 1st and Keke Rosberg finished 2nd but because of the FISA–FOCA war, Piquet and Rosberg were both disqualified for being underweight in post-race scrutineering, and the race victory was given to 3rd placed Alain Prost, who would go on to win at Jacarepaguá 4 more times (thus earning the nickname "the King of Rio"). The race also saw Italian Riccardo Patrese retire due to physical exhaustion (a very rare occurrence in F1, but quite common at Rio). Piquet won in 1983 and 1986, and the 1988 race was particularly notable, as up-and-coming star Ayrton Senna started from the pit-lane in his first race for McLaren; he began a furious charge that brought him up to second behind his teammate Prost; but he was disqualified for switching to his spare car after the parade lap had begun. The 1989 event was the last race at Jacarepaguá. It was won by British driver Nigel Mansell in his Ferrari, in the first Grand Prix won by a car with a semi-automatic gearbox, and it also saw German Bernd Schneider and American Eddie Cheever collide, and Cheever collapsed twice after he exited his car due to exhaustion. Return to a new Interlagos São Paulo native Ayrton Senna's success thus far in Formula One had city officials working hard to revamp the Interlagos circuit in a $15 million investment to shorten and smooth over the circuit. In the Grand Prix returned to a shortened Interlagos, where it has stayed since. The Interlagos circuit has created some of the most exciting and memorable races in recent Formula One history, and is regarded as one of the most challenging and exciting circuits on the F1 calendar. The first race at the new Interlagos in 1990 was won by Alain Prost, who won his 40th career race (the most ever at