Bentley Motors introduces an update to its flagship Mulsanne with the 2015 Mulsanne Speed. Weighing in at 530 horsepower and featuring a 6.75-liter twin-turbo V8 that has been upgraded to offer a headturning 811 pound-feet of torque, the Muslanne Speed is hands down one of the most powerful vehicles on the road. Every single pound-foot is required to move the sedan from 0 to 60 in 4.8 seconds, on the way to a top speed of 190 miles per hour. Other features of note include a re-calibrated eight-speed automatic transmission, improved combustion, a cylinder deactivation system, and an updated adjustable air suspension to aesthetic improvements like tinted grilles and lights, 21-inch wheels, a two-tone leather interior, and Mulliner Driving Specification. The 2015 Mulsanne Speed will make its official debut next month at the Paris Motor Show with deliveries to take place in the winter.