1983 Grand Prix motorcycle racing season championship. In a fitting end to a successful career, Roberts won his last-ever Grand Prix race, however Spencer was able to secure second place to claim the world championship. The two riders dominated the season with each claiming six victories and six pole positions in the 12 race series. The following Grands Prix were scheduled to take place in 1983: Points are awarded to the top ten finishers. A rider has to finish the race to earn points. 1983 Grand Prix motorcycle racing season The 1983 Grand Prix motorcycle racing season was the 35th F.I.M. Road racing World Championship season.
1987 Portuguese Grand Prix one usable car which went to Brundle. With Piquet finishing third ahead of both Mansell and Senna, Piquet expanded his championship points lead to 18 points over Senna and 24 over Mansell. Numbers in brackets refer to positions of normally aspirated entrants competing for the Jim Clark Trophy. 1987 Portuguese Grand Prix The 1987 Portuguese Grand Prix was a Formula One motor race held at Estoril on 20 September 1987. It was the twelfth round of the 1987 Formula One season. It was the 16th Portuguese Grand Prix and the fourth to be held at Estoril. The race was held