Two Sedans with more similarities, such as the body structure, starting price, ground shadow size, and maximum occupancy, than differences, like the model year, horsepower, fuel economy, and height. First of all, the 2016 Elantra has a more powerful engine and gets 2.4 mpg less than the 2014 Sentra. Also, the roofline of the Elantra is slightly lower than the Sentra's. Among similarities are the body structure, starting price, ground shadow size, and maximum occupancy.