The M roadster features a 3.2-liter DOHC, 24-valve inline 6-cylinder engine with Double-VANOS steplessly variable valve timing, 315-horsepower, and 251 lb-ft of torque; 5-speed manual transmission; Independent suspension with M calibration; M RoadStar light cast-alloy wheels with Satin Chrome finish; near-perfect 50/50 weight distribution; Dynamic Stability Control; All Season Traction with limited-slip differential; Rollover Protection System, 4-wheel BMW M vacuum-assisted ventilated disc brakes, many other standard features.The M coupe also features a 315hp, 3.2-liter 6-cylinder engine; and all of the features of the M roadster listed above, plus a coupe body for added strength and rigidity.