The Joy of Six: BMW's New Six Cylinder Luxury-Tourers Photo Gallery
Conventional features of BMW's new six include bucket tappets and a chain cam-drive on the right. Weight-saving touches include magnesium clutch and valve covers. The 120-degree crankshaft is a one-piece steel forging that weighs 28.5 pounds-only slightly heavier than the 22-lb. four-cylinder crank.