Despite the larger displacement and increased compression, the new engine gets better fuel economy yet produces 10 percent more torque than the engine it replaces in touring models. The improvement comes from 50 percent better intake and exhaust flow thanks to four valves per cylinder. To supply the necessary air, there is a high flow air filter as well as a bigger throttle body with a 55 mm diameter. A new knock sensor for each cylinder enables precise ignition timing control.