Two Sedans with more similarities, such as the body structure, market segment, starting price, fuel economy, height, and maximum occupancy, than differences, like the horsepower and ground shadow size. First of all, the 2015 Ford Taurus has a more powerful engine than the 2016 Chevrolet Impala. And finally, the 2016 Impala is slightly smaller than the 2015 Taurus. Among similarities are the body structure, market segment, starting price, fuel economy, height, and maximum occupancy.