The American SetA Naturally Aspirated Jeep Six Just Beat the Turbo Numbers
An independent tuner has taken Jeep's familiar 4.0-liter inline-six and added a full liter of displacement, with no turbocharger or supercharger attached. The resulting engine now makes more horsepower than Jeep quotes for its newer twin-turbo Hurricane inline-six. It's proof of how much power remains in the old platform when displacement alone does the work.
With reporting from The Drive.