2010 Z4 Roadster at Detroit Auto Show

BMW has released the first details and images for its all-new BMW Z4 Roadster, which is set to make its debut next month at the 2009 Detroit Auto Show before going on sale in the following months. The design of the new Z4 comes out through classic details interpreted in a very modern style, highlighted by an automated folding aluminum roof.

The hardtop brings the Z4 in line with the competition, opening and closing in 20 seconds. The weight penalty is offset by greater security, better visibility and greater comfort. The side windows are 40% larger than the outgoing soft-top model, and the rear window is fully 52% larger. The Z4 also keeps its classic roadster proportions, with a long hood, short overhangs, and strong shoulders. However, the car’s styling has been modernized with new integrated LED indicators on its flanks as well as on the head and tail-lamps.

The new car is slightly larger outside than its predecessor, offering significantly more comfort and storage. The new car is 5.8in longer, 0.4in wider, and 0.3in lower than the outgoing model. The wheelbase has also grown 0.1in to measure 98.8in from axle to axle.Two powertrains will be available at the car’s North America launch: a 300hp (224kW) twin-turbocharged 3.0L six wearing the new sDrive35i badge, and a 255hp (190kW) naturally aspirated version of the same engine in the sDrive30i model.

What’s most impressive is the torque characteristics of the turbocharged mill, which maintains its peak levels of 300lb-ft through a broad rev range from 1,400 to 5,000rpm. This allows the car to accelerate from 0-60mph in 5.0 seconds flat and reach an electronically controlled top speed of 150mph when equipped with an optional sport pack. The 0-60mph acceleration time for the sDrive30i, meanwhile, is 5.6 seconds.

While both models are available with a manual six-speed gearbox, the Z4 sDrive35i is available also with a dual-clutch sport automatic transmission featuring seven gears. The six-speed sport automatic is available on the Z4 sDrive30i. Both sport automatic transmissions feature steering wheel-mounted paddle shifters.

© Source: autofans
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