Having been fired by Renault, Prost was once again at McLaren for . Now using the TAG engines, the team dominated, scoring 12 wins and two-and-a-half times as many constructors' points as nearest rival Ferrari. In the Drivers' Championship, Lauda prevailed over Prost by half a point, the narrowest margin ever. The McLaren-TAGs were again strong in ; a third Constructors' Championship came their way while this time Prost won the Drivers' Championship. In , the Williams team were resurgent with their Honda engine and drivers Nigel Mansell and Nelson Piquet, while at McLaren, Lauda's replacement, 1982 champion Keke Rosberg could not gel with the car. Williams took the Constructors' Championship, but for Prost, wins in San Marino, Monaco, and Austria combined with the fact that the Williams drivers were taking points from each other meant that he retained a chance going into the last race, the Australian Grand Prix. There, a puncture for Mansell and a precautionary pit stop for Piquet gave Prost the race win and his second title, making him the first driver to win back-to-back championships since Jack Brabham in and 1960. In Barnard departed for Ferrari to be replaced by Steve Nichols (who himself joined Ferrari in 1989). In the hands of Prost and Stefan Johansson, though, Nichols's MP4/3 and the TAG engine could not match the Williams-Honda.