Under the Hood

Both engines incorporate direct fuel injection and turbocharging. The xDrive35i uses a new 3.0-liter inline-six-cylinder with one turbocharger, while the xDrive50i uses a 4.4-liter V-8 with two. Power ratings are unchanged on the new six-cylinder, but BMW says it is more efficient. BMW says both engines promise minimal turbo lag and a flat torque curve that begins under 2,000 rpm.

300-horsepower, 3.0-liter six-cylinder with 300 pounds-feet of torque (xDrive35i)
400-hp, 4.4-liter eight-cylinder with 450 pounds-feet of torque (xDrive50i)
New eight-speed automatic transmission
xDrive's Dynamic Performance Control doles out power from front to rear and side to side, at least among the rear wheels
Differential electronically varies power proactively from a full 50/50 lock to as much as 100 percent going to either wheel to enhance performance and safety
Adaptive Drive system electronically alters suspension's stiffness between sport- and comfort-oriented settings to suit different driving conditions

    See also:

    Automatic climate control
    Comfortable interior climateAUTO program 7offers the ideal air distribution and air volume for almost all conditions, refer to AUTO program below. All you need to do is select an interior temperat ...

    Light-emitting diodes LED
    Light-emitting diodes installed behind translucent lenses serve as the light source for many of the controls, displays and other equipment in your vehicle. These light-emitting diodes, which op ...

    Opening/closing the glass sunroof and sliding visor together
    Briefly press the switch twice in succession in the desired direction past the resistance point. The glass sunroof and sliding visor move together. Pressing the switch again stops the moti ...