The headline-grabbing powerplant is a twin-turbo 3.0-litre diesel with an output of 286hp and 580Nm of torque that has been developed from the engine used by the BMW 535d. Such power places the X3 3.0sd into the realm of sports car acceleration courtesy of a zero to 62mph time of 6.6 seconds and a 149mph top speed.
What sets the X3 3.0sd apart from previous X3s is that it comes equipped with the same twin-turbo technology that has already been showcased in the BMW 535d. By using two turbochargers, one smaller one larger, the X3 3.0sd offers high levels of low down pulling power as well as top end performance. It can do this because the smaller turbo boosts at low revs for instant, smooth and swift acceleration, but as engine speed builds the larger turbocharger comes into play to continue the rapid progress. The result is an engine that develops peak torque from just 1,750rpm through to 2,250rpm, but is capable of continuing to rev up to 4,400rpm – an unusually high limit for a diesel.