The M Roadster is the bulldog of the BMW family. Stocky in stature, muscular and determined-looking, it packs the power to deliver the performance promised by its looks. Its 240 bhp delivered through fat, 245/40ZR-17 Dunlop SP Sport rear tires, accompanied by the earnest growl of the six inline cylinders and bark of twin dual exhausts, can punch this car though the 60-mph barrier in 5.4 seconds. Just accelerating up through the gears gives anyone who drives the M Roadster sheer driving pleasure. Clean Carfax.