In , de Angelis was joined at Lotus by Ayrton Senna, who had left the Toleman team. De Angelis's second win came in the third race of the season, at the 1985 San Marino Grand Prix, after Alain Prost was disqualified when his &lt;a href="McLaren%20MP4/2"&gt;McLaren MP4/2B&lt;/a&gt; was found 2 kg underweight. De Angelis also claimed his last Formula One pole position that year in Canada. He finished fifth in the championship, with 33 points, five points behind his teammate. However, de Angelis chose to leave Lotus at the end of the season, frustrated that the team's efforts were being focused mostly on Senna.