For the 2009 Pontiac G6, a 2.4L four-cylinder engine has been added that produces 164 hp and 158 lb-ft of torque. A four-speed automatic transmission comes standard, while a six-speed automatic is in the optional Sport Package. With the four-speed transmission, EPA-estimated fuel economy is 22 mpg city/30 mpg hwy and 25 mpg combined but that goes up to 33 mpg hwy and 26 mpg combined with the six speed, and city mileage stays the same. Pontiac G6 GT standard features include a 3.5L V6 engine that puts out 219 hp and 219 lb-ft of torque and is paired to a four-speed automatic transmission. EPA mileage estimates for the base powertrain are 18 mpg city/29 mpg hwy and 22 mpg combined, while the G6 GT gets 17 mpg city/26 mpg hwy and 20 mpg combined. The G6 convertible offers an optional 3.9L V6 engine that is good for 222 hp and 238 lb-ft of torque and with the four-speed automatic transmission fuel economy is 15/22/18 mpg. The Pontiac G6 GXP gets a 3.6L V6 engine boasting 252 hp and 251 lb-ft of torque and with a six-speed automatic rates 17/26/20 mpg.