We're not sure why BMW is reticent to put forth a new Motorsports model of its Z4 folding hardtop convertible, but it has effectively introduced such a model in all but name here at the Detroit Auto Show. Inscrutably dubbed Z4 sDrive35is (we're guessing you can hit extralegal speeds by the time you successfully spit out its name), the new model features a revised twin-turbo 3.0-liter inline-six that spits out 340 horsepower and 332 pound-feet of torque, with an overboost function capable of a momentary bump up to 369 torques. Paired with BMW's seven-speed Sport Automatic dual-clutch transmission, the drivetrain is good for 0-62 miles-per-hour in in 4.8 seconds.
Additional alterations include a ride height that's lowered by 10 millimeters thanks to the adaptive M suspension, a revamped front fascia with matte aluminum trim bars, Oxide Silver mirror caps, and 19-inch alloys among other niceties – you can check out the complete roster of changes by checking out the press release after the jump.
M badges or no, we want one.