almost 2 sec slower than factory indicated 0-100km/h time in BMW catalog..

Do you think there was something wrong with the test car?? My personal experience was that I am able to keep up with a E46 M3 SMG all the way to 140km/h, then the M3 start to pull away... X5 4.4i can't even come close to keep up with my 4.6is and factory indicated 0-100 km/h on a 4.4i is 7.5sec.. not to mention the car is much lighter. Thats very strange.