Two Sedans with more similarities, such as the body structure, market segment, ground shadow size, height, and maximum occupancy, than differences, like the model year, powertrain, fuel economy, starting price, and horsepower. First of all, there is a $3,015 difference in the base MSRP. The 2013 Buick Regal Hybrid, an older vehicle by three model years, has a higher starting price than the 2016 Hyundai Sonata Hybrid. Also, the 2016 Sonata Hybrid has a more powerful engine than the 2013 Regal Hybrid, but it gets 11.5 more miles on a gallon of fuel. Among similarities are the body structure, market segment, ground shadow size, height, and maximum occupancy.