San Marino GP: Ayrton Senna, McLaren MP4-6 Honda, leads Nelson Piquet, Benetton B191 Ford, behind Stefano Modena, Tyrrell 020 Honda.
Ayrton Senna, McLaren MP4-6 Honda, leads Nelson Piquet, Benetton B191 Ford, behind Stefano Modena, Tyrrell 020 Honda.