Two Sedans with some similarities, but otherwise different in most aspects such as the model year, fuel economy, market segment, starting price, and horsepower. First of all, there is a $4,635 difference in the base MSRP. The 2013 Buick Regal, an older vehicle by three model years, has a higher starting price than the 2016 Hyundai Sonata Hybrid. Also, the 2013 Regal has a more powerful engine than the 2016 Sonata Hybrid, and it gets 18.5 fewer miles on a gallon of fuel. Among similarities are the body structure, ground shadow size, height, and maximum occupancy.