Two Sedans with more similarities, such as the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy, than differences, like the model year, horsepower, and fuel economy. First of all, the is a newer vehicle by 2 model years. And finally, although the 2016 Altima has a more powerful engine than the 2014 Passat, it gets 3.5 more mpg. Among similarities are the body structure, market segment, starting price, ground shadow size, height, and maximum occupancy.