Were these e30 m3's on a track with a lot of straights? The X5M is a pig compared to most any M3 and I would think the e46 or e90 wouldn't have a problem out doing it on a track in the corners.

I used to have an m6 and on the straights, nothing could touch it, but it wouldn't turn like a smaller lighter car.

__________________
Dinan CAI, TB, Camber Plates, Strut Bar, Software, Exhaust, Style 87 (summer), Style 89 (winter)