The mad scientists at Posaidon have done it again.
We've covered the work of Posaidon before. The German tuning firm has been known to give humble Mercedes-Benz models ludicrous amounts of power with relatively understated looks. Take for example the Mercedes-AMG GT 63 S that was turned into an 880-horsepower monster of a sedan, or the A45 S hot hatch that's as fast as a Ferrari. These guys know there way around an AMG, and while we've previously covered the tuning house's exploits before, its latest might also be its craziest. Meet Posaidon's 940 hp Mercedes-AMG G63. That's not a typo, this Gelandewagen develops almost as much power as a Bugatti Veyron and enough torque to move mountains with 943 lb-ft of the stuff.
To put that into perspective, the standard Mercedes-AMG G63 develops 577 hp and 627 lb-ft from a twin-turbocharged 4.0-liter V8. Poseidon's version generates an extra 363 hp and 316 lb-ft more torque. That's nearly a full 2.3-liter Ford Mustang worth of extra power. The result is nothing short of astounding, as the 2.5-ton offroader will run from 0-62 mph in just 3.6 seconds, meaning the 0-60 metric would arrive around three-tenths of a second sooner.
To achieve the gargantuan outputs, Poseidon swapped out the standard pair of turbos for a custom-built set, while also equipping a new exhaust system, tweaking the intake and cooling, and working on the cylinder heads. But all the extra boost generates some massive heat, so to smooth the combustion process and give it that final push, Poseidon equipped an additional tank to supply the juice to a water/methanol injection system, a similar setup to the one that enabled a 2020 Corvette to break 700 hp.
The ECU was tweaked substantially, too, but while the German firm could've gone balls to the wall and left the G63 unrestricted, sanity prevailed and a top speed limiter was installed to peg the super-SUV at 174 mph. Not forgetting that the G63 has a drag coefficient of 0.54, double that of a Toyota 86, which makes it cut through the air about as smoothly as a sledgehammer through four feet of concrete. Fortunately, the entire ordeal can be brought safely to a halt thanks to a set of carbon-ceramic brakes that even help reduce the curb weight.
In terms of stylistic updates, it's a game of spot the difference as Posaidon likes to build understated sleepers. The most noticeable difference is a hood with added carbon fiber air intakes, because those massive high-boost turbos need all the extra air and cooling they can get.