The XLR roadster, Cadillac's bold entry into the elite club of luxury convertibles, adds a dash of exclusivity to its unique combination of performance, advanced technology and dramatic design. The XLR is an icon for Cadillac's ongoing renaissance, expressing the brand's resurgence in the categories of serious performance, image, luxury and technical sophistication. The XLR represents the top of the Cadillac range with two basic models: the XLR with a 320-horsepower (239 kW) 4.6L Northstar V-8...