Two Sedans with more similarities, such as the body structure, market segment, starting price, height, and maximum occupancy, than differences, like the horsepower, fuel economy, and ground shadow size. First of all, the 2016 Ford Taurus has a more powerful engine and gets 2.3 mpg less than the 2015 Chevrolet Impala. And finally, the 2015 Impala is slightly smaller than the 2016 Taurus. Among similarities are the body structure, market segment, starting price, height, and maximum occupancy.