Honda plans to unveil its new Accord sedan Monday at an Ohio factory. The company promises a more athletic look with all-new engines and transmissions that will raise the car's fuel efficiency. The Accord is important because it competes in the biggest segment of the U.S. auto market. In most years it's No. 2 on the list of best-selling cars. Toyota's Camry is No. 1. Honda hasn't released many details but says the new model will have a sportier driving character than the current Accord. A new four-cylinder engine should boost fuel economy above the current Accord, which now gets 34 miles per gallon on the highway. The car will be made at Honda's Marysville, Ohio, factory near Columbus. Production is scheduled to start Monday.