i'll save you the trouble, its 400 degrees, so your list should be...
Cars that use 720 degrees of rotation:
XF GTI, XR GT, XR GT Turbo, RB4 GT, XFO Turbo, LX4, LX6, UF1000, UF GTR, XF GTR, FZ50, Raceabout..
Cars that use 540 degrees of rotation:
XR GTR, XFO GTR, FZ50 GTR
Cars that use 450 degrees of rotation:
Formula XR, Formula V8
Cars that use 400 degrees of rotation:
BMW Sauber
Car that uses 270 degrees of rotation:
MRT5