During 1993, Häkkinen, along with Senna, tested the Lamborghini V12 engine in a modified version of the McLaren MP4/8 race car dubbed the "MP4/8B" at both Estoril and Silverstone. Both drivers were impressed with the engine, with Häkkinen reportedly lapping Silverstone some 1.4 seconds faster in the MP4/8B with its V12 engine than he had with the team's race car fitted with the Ford V8.
During 1993, Häkkinen, along with Senna, tested the Lamborghini V12 engine in a modified version of the McLaren MP4/8 race car dubbed the "MP4/8B" at both Estoril and Silverstone. Both drivers were impressed with the engine with Häkkinen reportedly lapping Silverstone some 1.4 seconds faster in the MP4/8B with its V12 engine than he had with the team's race car fitted with the Ford V8