Mileage: 21 mpg combined city/highway
Starting price: $37,175
The Z4, with 215 hp, has a slightly less-powerful 3.0-liter, six-cylinder engine than the 328i. Some love the Z4's styling, some hate it. Considering that this is the "Ultimate Driving Machine" for power and handling, 21 mpg isn't bad, although it seems a little low for a small car.
