AMG 5.5-liter V-8

Late last year we first heard that Mercedes-Benz, together with its high-performance partner AMG, was going to replace its entire engine lineup with a new range of more fuel efficient direct-injected and turbocharged powerplants. Today we have official details on one of the most exciting of the newcomers, a 5.5-liter V-8 that replaces the 6.2-liter unit found in the current AMG lineup. Codenamed M157, the new 5.5-liter engine features direct-injection and twin-turbocharging technologies to ensure it produces more power and torque than the current 6.2-liter naturally aspirated mill. Peak...