I didnt test drive either of the two models because they did not have a 3 or 2,5 car available for a test drive but a 2 littre model which i did not drive because there was not a point in doing so.I did not consider the 3 litter engine because it is very expensive here and heavily taxed.I dont believe the 2,5 lacks in power.If you are considering the 3 littre engine why dont you choose the new X5?In Greece at least prices are simular and it is a brand new and better car.While waiting today at the workshop i went to the showroom and saw the X5,better in every aspect and more beautiful in reality than in photos.