2013 Mercedes-Benz GL63 AMG: As with all AMG models, the biggest change is under the hood. The GL63 sports AMG’s M157 twin-turbocharged, direct-injected 5.5-liter V8 (AMG keeps the “63” in the name out of habit). It produces 550 horsepower and 560 pound-feet of torque which, Mercedes says, will get it from zero to 60 mph in 4.9 seconds, and on to an electronically limited top speed of 155 mph.
The new engine is a major improvement over the stock GL550’s, which makes 429 hp. It also makes the GL63 faster in the 0-60 sprint than a Porsche Cayenne GTS, which weighs significantly less. The 2013 GL-Class hits showrooms this September, with the GL63 AMG following in the spring of 2013. Mercedes did not give any prices, but expect the GL63 to cost more than the 2012 GL550, which was priced at $85,300.
