Henceforth, this holy collection of hand-assembled metallic parts shall bring power to future AMG cars. Verily, it is a 5.5-liter, twin-turbo V8, superseding the none-too-shabby 6.3-liter naturally aspirated eight that doth make 518 hp and 465 lb-ft of torque. The new block on the, um, block kicks out 536 hp and 590 lb-ft, while reducing fuel consumption by up to 25 percent. This is achieved with the help of direct gasoline injection. Codenamed M157, this engine will be coupled to a seven-speed transmission that offers automatic and driver-operated gearshifts. There's also a Performance Package available to bulge output to 563 hp and 664 lb-ft. Amen to that.