Two Sedans with some similarities, but otherwise different in most aspects such as the modifications, horsepower, starting price, fuel economy, ground shadow size, and height. First of all, the 2016 Volvo S80 is priced $5,050 lower compared to the base MSRP of the 2015 Mercedes-Benz CLA-Class CLA 45 AMG. Also, the 2015 CLA-Class CLA 45 AMG has bigger and thirstier engine; the 2016 S80 gets 3 more mpg. In addition, not only CLA-Class CLA 45 AMG is slightly smaller, but it's also shorter than the S80. Among similarities are the body structure, market segment, and maximum occupancy.