The 6.9-liter V12 was a fully rebuilt version of Merc's M120 6.0-liter V12 engine, but after AMG's engineers had done their magic, it made 600 hp and 572 lb-ft of torque. The new unit was so ...

To imbue it with its own mechanical prowess, during the development phase based on McLaren's F1, the BMW engine was replaced with Mercedes' own: a V12 codenamed M120 and dubbed GT112. Delivering ...