Two Sedans with some similarities, but otherwise different in most aspects such as the model year, modifications, horsepower, starting price, fuel economy, and ground shadow size. First of all, there is a $5,750 difference in the base MSRP. The 2016 INFINITI Q50 Red Sport 400, a newer vehicle by three model years, has a higher starting price than the 2013 Audi A6. Also, the 2016 INFINITI Q50 Red Sport 400 has a more powerful engine than the 2013 A6, and it gets 2.6 fewer miles on a gallon of fuel. In addition, the A6 is slightly larger than the INFINITI Q50 Red Sport 400. Among similarities are the body structure, market segment, height, and maximum occupancy.