@Tricky - do you mean the "finish first in every race, in every car" Achievement? If so, it's an ambiguous description. There are 61 unique events, spread across the 41 cars, so you play the same event several times if you do all 5 events for each of the 41 cars. To get the Trophy/Achievement, you just have to win those 61 events, which will mean having to use all the cars at least once. I've got the Trophy (I went out of my way to get it sooner rather than later), with still about 15 cars to finish events for.