The all-new 2009 BMW Z4 Roadster is the eagerly anticipated replacement to both the Z4 Convertible and Z4 Coupe. Adding to this pressure, the two-seater is also tasked with satisfying the enthusiasts who enjoyed the high-performance M variants, both of which are discontinued - at least for the moment. Autoblog just spent a long day behind the wheel of the multi-role Z4, dissecting the Roadster's styling, ergonomics, chassis, powerplant and handling. How does the Z4 masquerade as four different models? Is it a credible replacement for one, or all? Most importantly, will the Z4 appease the enthusiast? Find out after the jump.



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