Two Sedans with some similarities, but otherwise different in most aspects such as the model year, horsepower, ground shadow size, height, and maximum occupancy. First of all, the 2013 Panamera has a more powerful engine than the 2016 A8. Also, the A8 body is slightly larger than the Panamera, and in addition to that, it's also taller. In addition, the Audi A8 seats one more passenger than the Porsche Panamera. Among similarities are the body structure, market segment, starting price, and fuel economy.