With its hand-built, twin-turbocharged, 6.0-liter V12 engine firing under its sculpted hood, the S65 AMG rockets from rest to 60 mph just half a click slower than a Corvette Z06, at 4.2 seconds. That’s what 604 horsepower peaking at about 5,000 rpm and 738 lb.-ft. of torque spread between 2,000 and 4,000 rpm will do for a car, even a heavy one like the redesigned 2007 Mercedes-Benz S-Class.