http://FremontMazda.com 888-786-9478 The 2013 Mazda 6 i versions are powered by a 2.5-liter four-cylinder engine that produces 170 horsepower and 167 pound-feet of torque. A six-speed manual transmission is standard on the i Sport. A five-speed automatic with manual shift control is offered on the i Sport and is the only choice available on i Touring, i Touring Plus and i Grand Touring models. Mazda 6 s Grand Touring is powered by a 3.7-liter V6 that produces 272 hp and 269 lb-ft of torque and is available only with a six-speed automatic. In testing, this model reached 60 mph from a standstill in 6.5 seconds - quick for its class.