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"   This story is really all about an engine: AMG&amp;#039;s all-new, handbuilt direct-injected 5.5-liter twin-turbo V-8. In standard tune it delivers 544 bhp and 590 lb.-ft. of torque; in optional high-power trim it produces 571 bhp and 664 lb.-ft. of torque, the latter from 2500 to 3750 rpm (with 645 lb.-ft. available from 2000 rpm). On the road that translates into stellar performance: 0\u201362 mph (100 km/h) in 4.4 seconds and an electronically limited top speed of 186 mph. Not bad for a long-wheelbase luxury sedan that tips the scales north of 5500 lb. What&amp;#039;s more, AMG claims the car is 25 percent more economical than the outgoing , which used a normally aspirated 6.2-liter V-8.   All this newfound energy is transmitted to the rear wheels via AMG&amp;#039;s Speedshift 7-speed transmission, which features a wet start-up clutch that replaces the conventional torque converter. What the previously mentioned performance figures don&amp;#039;t reveal, though, is the car&amp;#039;s phenomenal midrange performance fueled by those twin turbos once the tachometer sweeps past 2000 rpm\u2014before you can even think about it, this fabulous engine is hurtling the big S-Class down the road at impressive velocities. Quibbles: The automatic can&amp;#039;t be considered silky-smooth, the steering feel is a bit light and the handling a tad floaty. The S63 goes on sale in November, priced near $135,000. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/new-cars/future-cars/news/a16149/2011-mercedes-benz-s63-amg/>