BMW has held the world debut of its latest version of the popular Z4 roadster at the 2013 North American International Auto Show in Detroit. Currently BMW's only two seat drop-top to be offered, the BMW Z4 now comes with a new entry-level sDrive18i, while at the same time the Pure Traction Design package boasts a level of sophistication and high specification not seen on a Z4 before.
The new BMW Z4 sDrive18i engine heralds a new entry point into BMW Z4 ownership. This new derivative uses a de-tuned version of an existing 2.0-liter four-cylinder twin-scroll turbocharged engine. Producing 156hp at 5,000rpm from its 1,997cc powerplant the car is capable of zero to 100km/h time of 7.9 seconds before going on to a top speed of 220km/h.
Some of the existing engines have also received enhancements to improve their overall performance. The BMW Z4 sDrive20i comes with a 184hp.
Further up the range and the four-cylinder twin-scroll turbocharged sDrive28i, and the six-cylinder twin-turbocharged sDrive35i and the sDrive35is offer customers greater performance courtesy of their respective 245hp, 306hp and 340hp power outputs. All cars are rated at an electronically-limited 249km/h top speed.
Transmitting the power to the road is a six-speed manual gearbox as standard. Customers can also specify an eight-speed automatic with gear shift paddles, while buyers of the BMW Z4 sDrive35is have a seven-speed Double Clutch Transmission with gear shift paddles as standard.