2016 Hyundai Elantra is the newer version with some differences, such as the model year, horsepower, and fuel economy.. First of all, the is a newer vehicle by 3 model years. And finally, the 2016 Elantra has a more powerful engine than the 2013 Elantra, and it gets 2.4 fewer miles on a gallon of fuel. Among similarities are the body structure, starting price, ground shadow size, height, and maximum occupancy.