Choose the X3 M50, and you get a silky-sweet turbocharged 3.0-litre inline six-cylinder engine making 393 horsepower and 428 pound-feet of torque. Horsepower and torque are available almost continuously between 1,900 and 6,250 rpm. The engine and exhaust sound sensational, and the acceleration is exhilarating. BMW claims the M50 will zoom to 100 km/h in 4.6 seconds.
The M50 also gets performance hardware including an M Sport rear differential, M Sport brakes, an Adaptive M suspension, variable sport steering, and an exclusive exhaust system that creates that sensational sound.
As enticing as all that sounds, the base X3 30 xDrive’s 255-horsepower, turbocharged 2.0-litre four-cylinder engine is remarkably sprightly. You can scoot to 100 km/h in 6.3 seconds, and by selecting the optional M Sport Package, 21-inch wheels, M Sport brakes, and adaptive damping suspension, it's plenty of fun to drive in its own right. And like the M50, it comes standard with all-wheel drive (AWD).
Still, the X3 M50’s turbo six is magical, and its outright speed is intoxicating. If you have the means and don’t mind the cheap interior or a firm ride, the M50 is the one to get if a speedy SUV is what you want. On the other hand, if the BMW X3 is already stretching your budget, the X3 30 xDrive is still a satisfying choice.
Commendably, the straight six’s 48-volt mild hybrid system (also standard with the 30 xDrive) ensures the automatic engine stop/start system is barely noticeable. Unexpectedly, this version of the X3 is reasonably fuel efficient as well. The official fuel economy rating is 8.6 litres per 100 kilometres in combined driving, and we averaged 9.8 L/100 km on our mountainous test loop.
Despite the low-profile tires and stiff suspension, the X3 M50 didn’t beat us up as much as we expected, although it occasionally feels a little unnatural as it instantly attempts to quell unwanted body motions, depending on the road surface. The M Sport brakes are sometimes grabby, but overall the M50 is an agreeable commuter vessel.
The X3 has a remarkably tight turning radius, even equipped with optional 21-inch wheels. Add the responsive variable steering, outstanding available surround-view camera system, and optional Parking Assistant Plus technologies, and it’s easy to squeeze the X3 into places and spaces you might not otherwise attempt.
Towing isn’t off the table, either, as the M50’s 2,200-kilogram (4,850-pound) capacity is higher than that of some midsize SUVs. Even the base 30 xDrive can handle a substantial 1,800 kilograms (4,000 pounds) of trailer.