A twin-turbocharged 6.0-liter W12 engine with variable valve timing makes an impressive 552 horsepower at 6,100 rpm and a stunning 479 lb.-ft. of torque flowing from 1,600 rpm all the way up to 6,000 rpm. That trainload of torque is what makes the Bentley thunder from zero to 60 mph in 4.8 seconds, and the Continental GTC can achieve 190 mph with the top down, or 195 mph with the top up.