BMW's Z4 roadster goes topless on NAIAS stage

Just months after production of the last-generation BMW Z4 ended, the popular roadster has been updated, redesigned, and sent to Detroit to bow in front of NAIAS showgowers. The 2009 Z4 will boast the longest wheelbase in its class, as well as a folding aluminum top that opens and closes in just 20 seconds. Power will come from a pair of inline six-cylinder engines--topping out with a 300-horsepower punch delivered by a pair of turbochargers and direct-injection technology.