2015 BMW X6 M - Car and Driver (blog)

Power comes from a twin-turbo 4. 4-liter V-8 producing 567 hp, delivered to BMW’s xDrive all-wheel-drive system through an eight-speed automatic transmission. First Drive Review – 2015 BMW X6 M What It’s Packin’ This second-generation X6 M’s mechanical package also doesn’t stray far from the original’s. A variant of the engine in the M5/M6, it utilizes BMW’s Valvetronic variable valve timing and lift system and claims a lower rotating mass than its predecessor for quicker response. That keeps it meaningfully ahead of the X6 xDrive50i, which gets 445 horsepower from its own 4. 4-liter turbo V-8. Worryingly for BMW, however, Porsche’s just-announced Cayenne Turbo S and the new Mercedes-AMG GLE63 S coupe both boast higher... BMW claims to have sliced half a second from the zero-to-60-mph time, now 4. 0 seconds (for our part, we postulate 3. 9 seconds). Porsche further claims a 176-mph top speed for the Turbo S, while BMW limits the X6 M to 155 mph, although buyers in other markets can opt for a 174-mph limiter. In place of the previous six-speed automatic, BMW mates its new engine to an. Source: www.caranddriver.com