The BMW X6 M is one of the fastest SUVs on sale in the world With a 567bhp twin-turbo 4.4-litre V8 engine, it can get from 0-62mph in 4.2 seconds The X6 M shares its engine with the BMW X5 M, but with a coupe-like roofline It goes up against rivals like the Mercedes-AMG GLE Coupe 63 S and Porsche Cayenne Turbo S Adaptive M suspension, wide tyres and sharp steering give the BMW X6 M impressive agility for an SUV Circular LED daytime running lights help the X6 M to stand out, along with BMW's iconic kidney grille The X6 M also features LED tail-lights, along with quad exhaust pipes Despite its curving roofline, the X6 M still has enough space in the back for three adults Standard leather upholstery, a sports steering wheel and unique gauges help set the X6 M apart from the regular version The infotainment system is easy to use thanks to BMW's iDrive controller, and features internet services Sports gauges look clear, but the lack of a digital instrument cluster means the X6 is starting to show its age While the X5 M is more practical, the X6 M still has a 650-litre boot, matching the Mercedes GLE Coupe The large V8 engine has an impact on running costs, with a claimed 25mpg average economy Comfort mode allows the Adaptive M suspension to soak up bumps, while the X6 M is still surprisingly fun to drive Despite costing around £93,000, options include a panoramic sunroof, upgraded stereo and heated steering wheel