Standard M3 1:25.3 on a dry track
M3 competition pack 1:26.5 on a wet track

Which apparently makes the standard m3 the better car in top gear logic

I love the way that they make up the rules as they go along and if the wet laps are 4 seconds a lap slower than the dry laps, that makes the fancy m3 3 seconds a lap faster than the regular m3 and it's all about the laptimes.