The S63 AMG will feature the same 6.2-liter V-8 making 518 horsepower and mated to a seven-speed automatic transmission. Top of the line S65 AMG models are fitted with the 6.0-liter twin-turbo V-12 that makes 604 horsepower and 738 pound-feet of torque as well as a five speed automatic transmission. Both engines have been tweaked to reduce fuel consumption and CO2 emissions by up to 3 percent.
