(http://media.il.edmunds-media.com/ford/mustang/2013/as/11/la/2013_ford_mustang_actf34_11-la-as_1114112_196.jpg) Ford claims the 2013 Shelby GT500's 650-horsepower supercharged 5.8-liter is "the most powerful production V8 engine in the world."
InsideLine