January 13, 2009 We previewed the new Beemer Z4 roadster back in December - now we've had a chance to dribble on it at the Detroit NAIAS. The hardtop convertible is as slick and sporty as you'd expect, but its posing credentials are backed up a serious performance focus. Dynamic Drive control gives you three engine mapping/stability settings for the 300hp twin turbo inline 6 engine, to control your degree of hooliganism. Adaptive suspension with electronic damping control can adjust ride height on the fly, and adapt to road conditions so quickly that if you hit a bump with the front wheels, the back wheels will be adjusted in time to deal with it. The gearshift is accomplished either through an extremely short-travel manual 6-speed, a standard paddle-shift auto or a ripping seven-speed double-clutch sports auto. Bavarian beauty, brains and brawn in a 150mph top-down giggle machine.