A GM Inside News’ forum member speculates GM will produce two turbo four-cylinder powered Camaros starting in 2016. The first will have 260 horsepower, six speed automatic transmission, and get 34/47 mpg. The second model will have 325 horsepower, six speed auto or six speed manual, and get 27/37 mpg. This is all rumors at this point and is five years off. Which means a lot can change.