The hand-built 4.0L biturbo V8 is the car's emotional core, quoted by an owner at 577 hp and 627 lb-ft. Commenters describe rocket-like acceleration for the size and weight, a twitchy, growling character, and note the same engine's ubiquity across the AMG range. …
The 4.0L twin-turbo V8: a 577 hp brick
Mercedes-Benz G63 AMG (W463 2019+) · mechanical