The BMW X4 comes in two basic trims and two high performance X4 M trims. The xDrive30i is powered by a 2.0L turbocharged 4-cylinder engine which makes 248 horsepower. BMW claims a 0-60 time of just 6 seconds for the xDrive30i. The X4 M40i gets a 3.0L straight 6-cylinder engine, making 355 horsepower. X4 M models tunes the S58 straight 6-cylinder to produce 473 horsepower and 442-pound feet of torque. The Competition trim pushes the output even further to 503 horsepower. BMW uses their standard "xLine" and "M Performance" trim designations for the xDrive30i and M40i respectively. The xDrive30i gets unique 19-inch wheels, front and rear under guard elements and silver metallic side skirts. The M40i gets unique front and rear aprons with exterior accents painted in a high-gloss black color. Though the M40i also rides on 19-inch wheels, the design is unique and the wheels hide bigger brakes for more stopping power. The M40i also gets a unique sport exhaust that allows the user to switch between loud and quiet modes. Inside, the two trims are further differentiated by their interior styling and features. The xDrive30i comes with dark oakwood interior accent strips, chrome instrument bezels and high-gloss black highlights. In contrast, the M40i comes with aluminum accent strips, a sportier steering wheel and deeper sport seats. Both X4 M and X4 Competition vehicles are engineered with special attention to chassis stiffness, bigger brakes and adaptive suspension dampeners with custom Sport, Comfort and Race settings that tailor your experience to your preference. Unique quick ratio power steering tuning aided by heavy duty limited slip differentials and standard X-drive ensure the X4 remains planted wherever it goes. Outside bigger vents, unique wheels and M-badging round out most aesthetic differences between trims. The BMW X4 comes standard with a navigation system, which is displayed on a large 10.25-inch screen in the X4's center console. After various complaints about their iDrive system, BMW has resorted to offering multiple interaction systems. BMW now offers a cutting-edge gesture-recognition system that allows the driver to control the infotainment system with simple hand gestures waived into the air via a 3D sensor in the center console. Driver assistance options on the BMW X4 are numerous and include an active cruise control system that extends to stop-and-go traffic, meaning the car will automatically manage the speed and distance from the car ahead even in bumper-to-bumper traffic. Options also include a blind spot detection system, a lane departure warning system, a front collision warning system, rear cross traffic alert system and a speed limit recognition system.