First offered for the 2009 model year, the current Mazda 6 is powered by one of two engines -- a 2.5-liter four-cylinder generating 170 horsepower and 167 pound-feet of torque, or a 3.7-liter V6 that cranks out 272 hp and 269 lb-ft. The four is paired with either a six-speed manual transmission or a five-speed automatic, while the V6 is only available with a six-speed automatic.
