Mechanically, the Turbo S is largely identical to the "lesser" 911 Turbo, but the twin-turbocharged 3.8-liter flat-six receives a modest bump in power. Output has been boosted to 530 horsepower, a 30-horsepower gain over the Turbo. Porsche says the engine cranks out a maximum 516 pound-feet of torque between 2100-4000 rpm -- identical to a 911 Turbo equipped with the Sport Chrono package.