What we have here are two Coupes from Honda with some differences, such as the modifications, horsepower, and ground shadow size. First of all, the 2016 Honda Accord Coupe has a more powerful engine than the 2015 Honda Civic Coupe Si. Also, the body structure of 2016 Accord Coupe is slightly larger than that of the 2015 Civic Coupe Si. Among similarities are the body structure, market segment, starting price, fuel economy, height, and maximum occupancy.