2021 Audi RS 6 Avant vs. 2020 Buick Regal TourX

Two Wagons with more similarities, such as the body structure, market segment, height, maximum occupancy, and cargo volume, than differences, like the starting price, horsepower, fuel economy, and ground shadow size. First of all, there is a notable difference in the starting price of the 2020 Buick Regal TourX, which is $79,630 less than the base MSRP of the 2021 Audi RS 6 Avant. Also, the 2021 RS 6 Avant has bigger and thirstier engine; the 2020 Regal TourX gets 7 more mpg. And finally, the RS 6 Avant is slightly larger than the Regal TourX. Among similarities are the body structure, market segment, height, maximum occupancy, and cargo volume.