Not knocking you, but its a world of difference.

I have a pathfinder 3.5L VQ engine and weighs alot less then the X does, and its geared lower so topend after like 85mph sucks but its nice ans torquey 0-40-50, turns, acceling on short stretches of road etc..

Its not even close to 4.8 feel in a nutshell the 3.0 x5, didnt drive mine for 2 days doing maintenence and used my parents pathfinder again with even more power and less weight then a 3.0 X, and after finishing up my 4.8 man you really fall in love with the car again, 90-95 is getting warmed up before you do 120 with ease.

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2006 X5 4.8is Fully Loaded