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The GT2 RS's reputation as the most powerful street-legal car is as monstrous as this comprehensive guide. Suffice to say, this supercar has been built with the best Porsche has to offer. It's not bragging, it's just facts. There is no doubt that the new GT2 RS is the pinnacle of the 911 in terms of performance. It is simply the fastest 911 in history, and that’s a fact. It is the quickest production car to lap the Nürburgring Nordschleife. It is the most powerful 911 ever made.
Porsche’s 911 GT2 RS is a brute, a lightweight, twin-turbocharged, 620-hp bout of madness that stemmed from Stuttgart’s quest to see how high up the sports-car ladder the 911 could punch. It is the most serious roadgoing Porsche ever. The engine is a port-injected, 3.6-liter flat-six from the Le Mans–winning GT1 race car of the late ’90s, with a pair of variable-geometry turbochargers huffing a maximum of 23.2 psi of boost into the combustion chambers. The result is 620 hp at 6500 rpm and 516 lb-ft of torque at 2250. It gets a six-speed manual gearbox and rear-drive only. Yikes.