IF YOU think the Z4 roadster is a bit soft, consider this: it can match an M3 sedan in a straight line., , Well, it can if you select the range-topping $129,900 version that comes with the cumbersome name Z4 sDrive35is., , Equipped with a sweet in-line six-cylinder engine assisted by two turbochargers, it generates enough mumbo to shoot from 0-100km/h in just 4.8 seconds., , There is also the added bonus of being able to drop the roof for fun., , The hot Z4 also comes with the super-fast seven-speed dual-clutch automatic transmission, which also has a launch control feature.