The 2016 Shelby GT350 Mustang features a 5.2-liter V-8 engine that is capable of producing more than 500 hp, with a torque peak above 400 ft lbs—easily the most powerful naturally aspirated engine that Ford has ever produced. Raj Nair, Ford’s group vice president and head of global product development, differentiates this GT350 engine from that of the Ferrari 458 Speciale: “This car is for a different type of performance enthusiast,” he says. “The engine spins faster; it is a free-revving road-racing car.” Oth…