Portuguese GP: Nigel Mansell, Williams FW11B Honda, leads Ayrton Senna, Lotus 99T Honda, Nelson Piquet, Williams FW11B Honda, Alain Prost, McLaren MP4-3 TAG, Michele Alboreto, Ferrari F1-87, and Thierry Boutsen, Benetton B187 Ford.
Nigel Mansell, Williams FW11B Honda, leads Ayrton Senna, Lotus 99T Honda, Nelson Piquet, Williams FW11B Honda, Alain Prost, McLaren MP4-3 TAG, Michele Alboreto, Ferrari F1-87, and Thierry Boutsen, Benetton B187 Ford.