All BMW's (U.S. spec)have a limited top speed of 250 kph (155 mph), only exceptions are v8 M3 limited to 161mph and Alpina's. Alpina (a company like Saleen/roush is for fords) sells the B7 a modified 750i no limiter will go 189mph, but still has a warranty and is serviced at BMW dealers.
the new BMW m5 goes up to a 205mph which is brillinant and 255 brake horse power
The BMW M3 323i Does not exist.
i had mine up to 130 mph but it didnt fell good need a hard top for driveing fast
200-300 miles
155 mph
It depends on which model you are referring to.
top speed of the E63 bmw m6 is around 211
it goes 50000 mph
217 mph
160 mph
It all depends on the engine
The X3 reaches a top speed of up to 210 km/hour. A sports package will also be available with a top speed of up to 224/km/hour. http://www.usautoparts.net/bmw/models/x3/index.htm