full speed!!
 

took my x5 4.8 to a an empty deserted road to check it full speed
the head up display gave me and accurate 252km/h which is actually faster then what the official site says:P
and went head to haed with a cayyene S in a drag race won 3 times lost the 4th cause he did an old school launch control
and then went head on with a range rover super charged he actually beat me every time;s which is akward cause im suppoused to be faster

Now this is awkward... I never had the chance to race a 4.8i with my SD (Hartge 330hp).... But if what you are saying is true... then after all my Super Diesel might be faster than the 4.8i... since I have raced many times both my friends Cayenne S and my other 2 friends with a RR SC and won all of them every single time... and with a big difference also! and i i am talking not only 0-100 but also to speeds more than 200km....