In 1987 it was becoming increasingly difficult to compete with major manufacturer-backed teams using, effectively, a privateer engine financed in-house by TAG and built by Porsche. The Steve Nichols designed &lt;a href="McLaren%20MP4/3"&gt;McLaren MP4/3&lt;/a&gt;-TAG won three races with Prost finishing fourth in the drivers' championship, Prost's win in Portugal was cause for celebration as it was the Frenchman's 28th career win, taking him past the previous record of 27 wins by triple World Champion Jackie Stewart.