The 1989 Portuguese Grand Prix (formally the XXIII Grande Prémio de Portugal) was a Formula One motor race held at the Autódromo do Estoril in Estoril, Portugal on 24 September 1989. It was the thirteenth race of the 1989 Formula One World Championship. The 71-lap race was won by Gerhard Berger, driving a Ferrari, with Alain Prost second in a McLaren-Honda and Stefan Johansson third in an Onyx-Ford. Prost's teammate and Drivers' Championship rival, Ayrton Senna, retired following a collision with the Ferrari of Nigel Mansell, who had been black-flagged for reversing in the pit lane. As a result, Prost moved 24 points clear of Senna in the championship with three races remaining. As well as Johansson taking Onyx's only podium finish, the race also saw Pierluigi Martini lead for one lap – the first and only time the Minardi team led a Formula One race – and ten drivers from ten different teams finish in the top ten places. The race was also Prost's 150th Grand Prix start and the last start for the Coloni team, though it would continue in F1 until the end of 1991. Qualifying Pre-qualifying report Onyx returned to the top of the Friday morning time sheets as Stefan Johansson was fastest by half a second. His new team-mate was Finnish driver JJ Lehto, who had replaced Bertrand Gachot since the last race, after Gachot openly criticised the team and was fired. In his first Formula One event, Lehto just missed out on pre-qualification after a suspension failure during the session, leaving him fifth. The Larrousse-Lola cars both pre-qualified again, with Philippe Alliot second and Michele Alboreto fourth. The other driver to go through to the main qualifying sessions was Roberto Moreno in third place in the Coloni. Yannick Dalmas had originally pre-qualified in third place in his AGS, but was excluded from the session and his times were deleted, after mistakenly using the wrong tyres. Also excluded was Osella driver Nicola Larini, for missing a weight check, although he had already failed to pre-qualify, being only ninth fastest. The other drivers who failed to proceed any further included the other Osella of Piercarlo Ghinzani, who outpaced his team-mate in sixth, and Oscar Larrauri, despite an improvement to seventh in the EuroBrun. Eighth was Gabriele Tarquini in the other AGS, ahead of the Zakspeeds of Aguri Suzuki and Bernd Schneider. Slowest by nearly four seconds