Itdepends on your definition of powerful. The 2011 X5 ranges in power from the xDrive35d Sport Utility 4D with 265 horsepower and a 0-60 time of 6.9 seconds to the xDrive50i Sport Utility 4D with Thesix-speed gearbox is available with the 535i, which has the single twin-scroll turbocharged 3.0-liter I-6 rated 300 horsepower and 300 pound-feet, and the 550i with its 4.4-liter twin-turbo 2012BMW 550i xDrive (aut. 8) engine Horsepower / Torque Curve. Engine horsepower and torque curve for BMW 550i xDrive (aut. 8) in 2012, the model with 4-door sedan body and V-8 4395 cm3 / 267.9 cui, 298 kW / 405 PS / 400 hp (SAE net) offered since mid-year 2011 for North America U.S.. Detailed engine characteristics. BMW catalogue. 2011BMW 5 Series 535i xDrive AWD Navi Sunroof Park Assist 2011 BMW 5 Series 4dr Sdn 550i xDrive AWD Has almost every option for that year. 400 HP Adaptive Cruise Executive Package M Package Entertainment Package Very fun car to drive. Sad to see it go. Engine light on, not sure what it is cause it's a bmw It comes with winter tires As is. TheM550i, in its initial form, came with 456 horsepower and 480 pound-feet of torque, and with xDrive routing motivation to the ground through all four wheels, that’s good enough for a zero-to-60 time of 3.7 seconds, while the quarter mile is covered in 12.3 seconds with a trap speed of 115 mph. 2011BMW 5-Series Configurations. Select up to 3 trims below to compare some key specs and options for the 2011 BMW 5-Series. For full details such as dimensions, cargo capacity, suspension, colors, and brakes, specific 5-Series trim. 5dr 550i xDrive Gran Turismo AWD. Transmission: Automatic. Drivetrain: All Wheel Drive. MPG: 15 City / 22 Howmany cylinders, 2010 BMW 550i (407 Hp) xDrive Steptronic? 8, V-engine: What is the drivetrain, BMW 5 Series Sedan (F10) Sedan 2010 550i (407 Hp) xDrive Steptronic? All wheel drive (4x4). Internal Combustion engine. How long is this vehicle, 2010 BMW 5 Series Sedan? 4899 mm 192.87 in. How wide is the vehicle, 2010 BMW 5 Series Sedan? 1860 Its not just the rear-biased nature of the xDrive all-wheel drive system that prompted the caution, but also the M550i's 4.4-liter twin-turbo V-8, which packs 456 horsepower and 480 lb-ft of Hjmb.