M division’s Bernd Limmer reveals that the X5 M and X6 M will be powered by versions of the existing twin-turbo 4.4L V8, likely tuned to around 500 horsepower. Being an M car has always required more than just high horses, however, and we can expect the X vehicles to feature heavily tuned suspensions and all-wheel-drive systems with a rear bias for better handling. Throw in better brakes, bigger wheels and tires and subtly revised styling, and consider the next chapter of M read until the official reveal takes place in early April.
The standard 400-hp 4.4-liter twin-turbo V8 has been boosted to a massive 555 hp and 500 lb-ft of torque.
New M5 engine? as well