MERCEDES AMG G63 4×42 The G-Wagen on portal axles has returned for a second generation. This is the 2022 Mercedes-AMG G63 4x42, or 4x4 Squared, if you prefer. Bigger, more powerful and more capable, the latest 4x42 proves that warlord chic never goes out of style. Powering the biggest G63 is AMG's 4.0-liter twin-turbo V-8 all-star. Here, it pumps out 577 horsepower and 612 lb-ft of torque. The power hits an off-road-optimized edition of AMG's nine-speed wet-clutch automatic transmission complete with a transfer case (for 4-Low) and permanent AWD.