Engine:V8
Displacement:6300 cc
Horsepower:507 bhp
Torque:465 lb-ft
Transmission:7-Speed Automatic
The Mercedes-Benz CLS63 AMG is powered by one of the most powerfulnaturally aspirated production V8s ever, also the first enginedeveloped entirely by AMG. Built almost completely from a high-strengthsilicon-aluminum alloy, the 6.3-liter features four valves percylinder, double overhead camshafts with variable valve timing, buckettappets (rather than rocker arms), an 11.3-to 1 compression ratio and avariable intake manifold.
AMG engineers designed the 6.3-liter engine block with an especiallyrigid bedplate with cast-in steel reinforcements at the main bearing,and a sturdy closed-deck layout beside the cylinder heads. A first fora production engine, the cylinder bores feature a twin-wire-arc-sprayed(TWAS) coating, a new process that results in impressively low frictionand running surfaces that are twice as hard as conventional cast-ironcylinders. Sharing no parts with Mercedes-Benz V8 engines, the 6.3 AMGengine revs freely to over 7,000 rpm, yet already produces nearly 90percent of its peak torque at only 2,000 rpm.
Power is transmitted to the rear wheels of the CLS63 AMG via aseven-speed AMG Speedshift automatic transmission that can be shiftedmanually by either a conventional lever or Formula-1 style shiftpaddles on the AMG sport steering wheel. AMG Speedshift electroniccontrol provides 35% faster gear shifts, and to give performance-mindeddrivers total control of shifting, the manual mode of AMG Speedshiftdoesn’t make any automatic upshifts or downshifts – even at max enginespeed or full load.
