Senna won the first four races of the season, in the United States, Brazil, San Marino and Monaco, before Williams and Nigel Mansell found their feet with the FW14, which dominated in mid-season. Consistent podium finishes throughout the year helped McLaren, but Senna insisted that Honda step up their engine development programme and demanded further improvements to the car before it was too late. Honda responded with updated versions of the V12 engine, while Oatley redesigned various features of the car, particularly the sidepods and wings. Senna won in Hungary and Belgium before clinching his third and final Drivers' Championship in Japan with second place behind Berger; he then won the final race in Australia to secure the team's fourth consecutive Constructors' Championship.