| Model Year | 2008 | 2020 | |
| Model | Audi A8 / S8 | Mercedes-Benz GLA | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 121.0 in | 106.3 in | 14.7 in |
| Length | 204.4 in | 173.9 in | 30.5 in |
| Width | 74.6 in | 71.0 in | 3.6 in |
| Height | 57.3 in | 60.0 in | -2.7 in |
| Curb Weight | 4399 lb. | 3296 lb. | 1103 lb. |
| Fuel Capacity | 23.8 gal. | 14.8 gal. | 9 gal. |
| Headroom, Row 1 | 37.4 in | 40.0 in | -2.6 in |
| Shoulder Room, Row 1 | 59.1 in | 54.8 in | 4.3 in |
| Legroom, Row 1 | 41.3 in | 41.9 in | -0.6 in |
| Headroom, Row 2 | 38.3 in | 38.4 in | -0.1 in |
| Shoulder Room, Row 2 | 57.5 in | 53.1 in | 4.4 in |
| Legroom, Row 2 | 42.3 in | 33.9 in | 8.4 in |
| Total Legroom | 83.6 in (over 2 rows) | 75.8 in (over 2 rows) | 7.8 in |
| Cargo Volume, Minimum | 14.6 ft3 | 17.2 ft3 | -2.6 ft3 |
| Cargo Volume, Maximum | 14.6 ft3 | 43.6 ft3 | -29 ft3 |
None of our members have yet commented on the seat room and comfort of the 2008 Audi A8 / S8.
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz GLA.