Although the V8 model is not among them, we can now see how the EPA has rated those models with a half dozen pistons or less. The Mustang EcoBoost with the turbo four and a manual transmission has been rated at 22 miles per gallon in the city and 31 on the highway. The V6 manual gets 17 city and 28 highway, while the V6 automatic squeezes out a bit more in the city at 19 mpg but carries the same 28 highway rating.
By way of comparison, the latest Chevy Camaro with the V6 and a stick shift gets the same 17/28 EPA rating as a similarly equipped new 'Stang, and the V6 automatic Camaro gets 18/27 (slightly behind the Ford, but if you opt for the Camaro 2LS with its V6, automatic and 2.92 rear axle ratio, you'll be looking at 19 and 30).
Dodge doesn't offer a manual on the six-cylinder Challenger, but with the new eight-speed automatic, it gets the same 19/30 rating as the Camaro 2LS, both better than the six-cylinder, automatic Mustang on the highway – though the EcoBoost has, as expected, emerged as the most fuel-efficient pony car on the market.