Carfax Certified !! 240HP Rocket !! Wearing most aggressive bodywork, exposed brake cooling ducts, and sitting a full inch closer to the ground, the M Roadster is the bad boy of the BMW line, and backs up that image with the same 3.2-liter, 240-horsepower, six-cylinder engine used in the M3. The lightweight M Roadster rocketed out of corners and down straights. A task made easier by a light, slick shifter that we would have loved in the M3 Convertible. Well take the 4-wheel disc brakes, too, which delivered power and feel matching that of, yes well say it again, a race car.