Mercedes-Benz unveils 2011 S63 AMG with twin-turbo 5.5L V8
Engine downsizing has now come to the almost top-of-the-line Mercedes-Benz S63 AMG with the adoption of AMG’s new twin-turbo 5.5-liter V8. The new direct-injected V8 bumps output up from a mere 518 horsepower to 571 horsepower along with generating 663 pound-feet of torque between 2,250 and 3,750 rpm. That’s sufficient to propel this behemoth […]