The BMW Z4 offers both efficient and fast versions of the roadster, so you can choose your flavor of fuel economy.
The sportiest model, the Z4 sDrive35is, scores 17/24/20 mpg city/highway/combined. The sDrive35i rates the same 17/24/20 mpg, also with the dual-clutch seven-speed gearbox.
The base Z4 sDrive28is uses a turbocharged four-cylinder engine to score 22 mpg city, 34 mpg highway, and 26 mpg combined with the manual transmission. Opting for the eight-speed auto shaves 1 mpg from the highway rating, but leaves the others untouched.
Those looking to save some cash at the pump with their sport roadster will choose the turbo four-cylinder Z4 sDrive28i, and in our experience, real-world gas mileage easily matches, and occasionally exceeds, the EPA ratings.