The Ferrari F2007 in GT5 Prologue. Only had the game for about 4 or so days, played it nearly non stop and finally completed all of the races, and saved up the 2M credits.
Sorry about my poor driving (no traction control or ASM switched on and not using a wheel) and also about the quality of the video. It was filmed using my digital camera with the game being played on a 28" HD TV.
The Ford Supervan 3, essentially an ordinary Ford Transit with a hugely powerful engine bolted into the back of it. According to the commentary on the day, well what we heard of it anyway, it has a Le Mans engine, but after googling it, it has an F1 engine which produces 650bhp.
The chassis was from the Ford C100 Race car and the engine is mid mounted.