| Model Year | 2016 | 2021 | |
| Model | Audi A8 / S8 | Mazda CX-9 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 122.9 in | 115.3 in | 7.6 in |
| Length | 207.4 in | 199.4 in | 8 in |
| Width | 76.7 in | 77.5 in | -0.8 in |
| Height | 57.9 in | 69.0 in | -11.1 in |
| Curb Weight | 4464 lb. | 4225 lb. | 239 lb. |
| Fuel Capacity | 21.7 gal. | 19.0 gal. | 2.7 gal. |
| Headroom, Row 1 | 37.2 in | 39.3 in | -2.1 in |
| Shoulder Room, Row 1 | 59.1 in | 57.9 in | 1.2 in |
| Hip Room, Row 1 | 0.0 in | 56.7 in | -56.7 in |
| Legroom, Row 1 | 41.4 in | 41.0 in | 0.4 in |
| Headroom, Row 2 | 39.1 in | 38.5 in | 0.6 in |
| Shoulder Room, Row 2 | 57.8 in | 58.1 in | -0.3 in |
| Hip Room, Row 2 | 0.0 in | 57.4 in | -57.4 in |
| Legroom, Row 2 | 42.9 in | 39.4 in | 3.5 in |
| Headroom, Row 3 | 0.0 in | 35.4 in | -35.4 in |
| Shoulder Room, Row 3 | 0.0 in | 53.1 in | -53.1 in |
| Hip Room, Row 3 | 0.0 in | 40.1 in | -40.1 in |
| Legroom, Row 3 | 0.0 in | 29.7 in | -29.7 in |
| Total Legroom | 84.3 in (over 2 rows) | 110.1 in (over 3 rows) | -25.8 in |
| Cargo Volume, Minimum | 14.2 ft3 | 14.4 ft3 | -0.2 ft3 |
| Cargo Volume, Behind R2 | 14.2 | 38.2 ft3 | -24 |
| Cargo Volume, Maximum | 14.2 ft3 | 71.2 ft3 | -57 ft3 |
None of our members have yet commented on the seat room and comfort of the 2016 Audi A8 / S8.
None of our members have yet commented on the seat room and comfort of the 2021 Mazda CX-9.