Two Sedans with some similarities, but otherwise different in most aspects such as the horsepower, fuel economy, ground shadow size, and height. First of all, the 2016 Lexus IS 350 has a more powerful engine and gets 4.5 mpg less than the 2015 Volvo S80. And finally, the 2016 IS 350 body is slightly smaller than the 2015 S80, and in addition to that, it's also shorter. Among similarities are the body structure, market segment, starting price, and maximum occupancy.