E60 / E61 (2004 - 2010)
I just bought a 2010 550i w/ M Sport, M suspension, HUD, 7 Logic stereo, etc. Carbon black (navy blue) and creme interior. I drove it 9 hours to home and at 75-80mph, it was at 2,100RPM to 2,400RPM. That seemed high and it made a sort of roar at hiway speeds. It has Michelin Sport pilot tires...