Emphasizing sport over utility, the X4 is a coupelike variant of the X3. It's agile, rides tautly, and has a beautifully trimmed cabin. Seating is a bit lower than in the X3, which instills a more sporty experience. Cargo and rear-seat space under the sloping roofline is considerably smaller than in the X3, making the X4 a less practical SUV. Engine choices are a 240-hp, 2.0-liter turbo four-cylinder and a 3.0-liter turbo six-cylinder that is particularly smooth and powerful. An eight-speed automatic transmission and all-wheel drive are standard. In our brief time with the X4 we found that the optional 19-inch tires make the ride a bit too jiggly. A higher-performance M40i uses a 355-hp version of the turbo six-cylinder.