What Car? says...
The introduction of any new M car is usually met with a big cheer from car enthusiasts, but the BMW X3 M Competition almost feels like it slipped under the radar. This is the first time the X3 has received the full attention of BMW’s M division, culminating in extra engine cooling to suit track use, bigger brakes and extra body bracing for increased stiffness. But perhaps more tantalising is the X3 M’s bespoke engine. It’s the most powerful straight six yet fitted to a production BMW.
A large SUV packing more than 500bhp sounds pretty bonkers, but it’s far from a novel concept. Indeed, the X3 M Competition competes against the similarly power-crazed Mercedes-AMG GLC 63S and Alfa Romeo Stelvio Quadrifoglio, as well as the Porsche Macan Turbo. All of them share similar power outputs and have similar 0-62mph acceleration times, so which one should you pick?