2011 BMW Z4

The two-seat 2011 BMW Z4 continues to be an attractive roadster with impressive engine and transmission options. Unique styling sets the Z4 apart from some other competitors, though most experts agree that the 2011 Porsche Boxster (Base MSRP: $47,600 to $61,200) (Base MSRP: $47,600 to $61,200) offers better performance and as much luxury for about the same price. Our full report on the 2009 BMW Z4 (*Est. $45,750 to $51,650) provides a detailed look at this convertible and what reviewers think of it.

The 2011 model year adds a new top-of-the-line trim, the sDrive35is, which adds a new, even more powerful version of BMW's twin-turbocharged inline-six, boosting output to 335 horsepower and 332 pound-feet of torque. The sDrive35is comes standard with a new M Sport Package, now optional on the cheaper trims as well, that adds sporty accoutrements that are both functional and stylish, like adaptive suspension dampers, sport seats and an increased top speed.

The base Z4 convertible, the sDrive30i, still comes with a 3-liter inline-six, making 255 horsepower and 220 pound-feet of torque, and a standard six-speed manual transmission that is Environmental Protection Agency-rated at 18 mpg city, 28 mpg highway and 22 mpg combined. Models with the optional six-speed automatic post the same numbers.