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:

    All around the steering wheel
    1 Seating comfort functions* Gentleman function* Seat, mirror, steering wheel memory* Active seat* 2 Roller sunblind* for rear window 3 Safety switch for the windows and the roller sun b ...

    Arming and disarming the alarm system
    General information When you lock or unlock the vehicle, either with the remote control or at the door lock*, the alarm system is armed or disarmed at the same time. Door lock and armed alarm sy ...

    Controls
    1 Control Display 2 Controller with buttons The buttons can be used to open the menus directly. The controller can be used to select menu items and create the settings. ...