Second generation of the Z4, still BMW's only two-seat sports car. Replaced the previous roadster (E85) and coupé (E86) versions. The roadster has a 20 second retractible hardtop, a brand new generation iDrive system (that made its debut on the new Z4) as part of the navigation system, leather that incorporates Sun Reflective Technology and a standard sound system. Engine wise, there are two new units, both with 6 cylinders and a 3.0-liter displacement. The Z4 sDrive30i develops a maximum power of 255hp and is able to accelerate from 0 to 60 in 5.6 seconds. The sDrive35i uses two turbochargers to give the car 300 hp allowing the car to sprint to 60 in a whisk over 5 seconds. The hardtop can be opened at the touch of a button while the car is moving at up to 40 km/h (25 mph) in an automated process lasting 19 seconds.