With 577 horsepower and 561 lb-ft of torque on tap, the Mercedes-AMG GLE 63 S Coupe is no slouch. But one tuner in Poland, auto-Dynamics.pl, evidently felt it could use more muscle. So that's just what it gave the slantback crossover.

Called Project Inferno, the big Benz packs new turbos and exhaust and a remapped ECU to unleash a mind-boggling 806 horsepower and 871 lb-ft from the 4.0-liter twin-turbo V8. That's a good 200 hp more than the Porsche Cayenne Turbo, Rolls-Royce Cullinan, BMW X5/X6M, Range Rover Sport SVR, Maserati Levante Trofeo, Bentley Bentayga, or even the Lamborghini Urus.

The seven-speed automatic transmission was also upgraded to handle the extra twist, while to add some visual flair, the Warsaw-based tuner fitted a new set of 23-inch Vossen alloys on a suspension lowered by Brabus, and a body kit from TopCar.

The sum total of all the modifications, according to the customizer, is a 0-62 mph time now down to 3.25 seconds and a top speed quoted at 209 mph. Those would be impressive figures in a low-slung, lightweight sports car, but are all the more striking in a vehicle this big.

Not your cup of... whatever kind of tea it is they drink in Poland? auto-Dynamics.pl has tuned a long list of other (almost entirely German) machinery, from little hatchbacks like the Mercedes-AMG A45 to big crossovers like the BMW X5 and sedans like the Porsche Panamera, Audi A7, Mercedes CLS. It's also handled some proper supercars along the way, like the Ferrari 488 GTB and Porsche 911 Turbo S, and even a Mercedes V-Class van (known in our parts as the Metris), too. But few pack the kind of muscle it's squeezed out of the GLE.