Two Sedans with more similarities, such as the body structure, starting price, height, and maximum occupancy, than differences, like the fuel economy, market segment, horsepower, and ground shadow size. First of all, the 2016 Audi A4 has a more powerful engine than the 2015 Ford Fusion Energi, and it gets 12.4 fewer miles on a gallon of fuel. Also, the 2016 A4 has a slightly smaller body than the 2015 Fusion Energi. Among similarities are the body structure, starting price, height, and maximum occupancy.