Mercedes AMG GT Engine Revealed in Detail

Mercedes AMG GT Engine Revealed in Detail

Mercedes’ new sports car will be powered by a 4.0-liter biturbo V8 that cranks out 503 hp and 479 lb-ft of torque.

Continuing its “one man, one engine” philosophy, each engine will be hand-built in Affalterbach, Germany. If you’re keeping score, the official output means that AMG’s new, much smaller mill will make as much torque as the 6.2-liter V8 currently powering the SLS AMG GT. Of course, it makes quite a bit less horsepower. But will that matter?

With a dry-sump lubrication system, Mercedes says the engine is able to sit 2.2 inches lower in the chassis. It also takes advantage of an advanced direct injection system with variable fuel pressure between 1,450 and 2,900 psi through a set of piezo injectors. AMG nestled the turbochargers on the inside of the V-configured cylinders. By placing the turbochargers there rather than on the outside of the cylinder banks, the engine is more compact. That in tandem with the dry sump system will help give the AMG GT a lower center of gravity and in turn, improved lateral dynamics.Mercedes-AMG 4.0-Liter Biturbo-Motor (M 178); 2014

This engine has the same bore and stroke ratio as the crazy 2.0-liter turbo four-cylinder powering the CLA 45 AMG, meaning it will be capable of relatively high RPM. In this case, the maximum engine speed is 7,200 RPM. Peak torque arrives at 1,750 RPM and remains until 4,750 while the full 503 hp comes on at 6,250 RPM.

Mercedes also promises that the smaller engine will still have the signature AMG sound thanks to variable exhaust flaps that will mute most of the engine noise for normal driving or optionally open to release the engine’s full sound.

An official debut for the new AMG GT hasn’t been announced yet, but the car is expected to debut in the fall during either the Paris Motor Show or L.A. Auto Show.

GALLERY: Mercedes-AMG GT Teasers


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