2011 Mercedes-Benz S63 AMG - Prototype Drive ، مواصفات النموذج الاولي لمرسيدس بنز 2011

The new engine, internally called the M157, replaces the M156, a naturally aspirated 6.2-liter V-8 that produces 518 hp in the current S-class. This high-revving powerhouse, with its racing-inspired integrated bed plate, was launched a mere five years ago. It can rev up to 7200 rpm, as opposed to the new engine’s 6800-rpm max, and its torque peak of 465 lb-ft is reached at a late 5200 rpm. In other words, it’s a supersized version of a classic sports-car engine. The era of high-revving, naturally aspirated engines has passed its zenith at Mercedes-Benz’s AMG performance division. This October, the 2011 S63 AMG will get an entirely new 5.5-liter V-8 fed by a third-generation direct-injection system from Bosch and two Honeywell turbochargers. Mercedes will offer two versions. The base S63 AMG will have 536 hp and produce 590 lb-ft of torque between 2000 and 4500 rpm. The optional Performance package increases turbo pressure from 15 to 19 psi, raising output to 563 hp with 664 lb-ft available between 2500 and 3750 rpm.

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