For the new 3.5 L naturally aspirated regulations for 1989, Honda debuted the new RA109E V10 in the &lt;a href="McLaren%20MP4/5"&gt;McLaren MP4/5&lt;/a&gt; and were now exclusively supplying McLaren; Lotus were forced to use Judd engines. This engine proved as dominant as the V6 turbo before it, taking 10 wins and 15 pole positions during the season and powering Prost to the 1989 Drivers' Championship. For 1990, a further developed version of the V10 and the MP4/5B powered Senna to the 1990 Drivers' Championship. For 1991, Honda developed a brand new V12, the RA121E, with which Senna ultimately won his third world championship. 1992 saw the Adrian Newey designed Williams FW14B chassis to be superior to any other car that season, and McLaren-Honda finished 2nd in the Constructors' Championship. Honda's final win of this era came when Gerhard Berger won the 1992 Australian Grand Prix, the final race of the season. The company had decided to pull out of Formula One after the 1992 season due to the burst of the Japanese asset price bubble that occurred that year.