When BMW launched the new Z4 early this year, they made it clear that, unlike the last Z4 and the Z3 before it, there were no plans to create an M version this time around. Of course, forgoing the M nomenclature doesn't mean that BMW won't create a faster Z4 than what's currently in showrooms.
In fact, the first of those faster roadsters will debut next month at the Detroit Auto Show. The Z4 sDrive35is is based on the existing 35i, with its delicious twin-turbocharged 3.0-liter inline six. Compared to the existing turbo Z4, the new model gets a higher-flow intake and the turbos are allowed to spin up to higher boost pressures, resulting in an 11 percent bump in both power and torque output. The '35is now makes 335 hp and 332 pound-feet. In fact, for brief bursts, the 35is can crank up the boost even higher resulting in short periods of up to 369 pound-feet of torque.
BMW claims the Z4 sDrive35is will get to 60 mph in just 4.7 seconds. Other features of the 35is include revised electric electric power steering programming, a standard dual-clutch gearbox, and brake energy regeneration. Visually, the 35is wears some M Sport aero and suspension bits and sees its ride height dropped 0.4 inches lower than the standard 35i. They may not be calling this a full M Roadster, but in most respects, that's exactly what this new model is.