| Model Year | 2008 | 2018 | |
| Model | Audi A8 / S8 | Mercedes-Benz S-Class | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr Sedan, ext. | |
| Difference | |||
| Wheelbase | 121.0 in | 124.6 in | -3.6 in |
| Length | 204.4 in | 206.5 in | -2.1 in |
| Width | 74.6 in | 74.8 in | -0.2 in |
| Height | 57.3 in | 58.7 in | -1.4 in |
| Curb Weight | 4399 lb. | 4731 lb. | -332 lb. |
| Fuel Capacity | 23.8 gal. | 21.1 gal. | 2.7 gal. |
| Headroom, Row 1 | 37.4 in | 39.7 in | -2.3 in |
| Shoulder Room, Row 1 | 59.1 in | 59.7 in | -0.6 in |
| Legroom, Row 1 | 41.3 in | 41.4 in | -0.1 in |
| Headroom, Row 2 | 38.3 in | 37.4 in | 0.9 in |
| Shoulder Room, Row 2 | 57.5 in | 59.1 in | -1.6 in |
| Legroom, Row 2 | 42.3 in | 43.1 in | -0.8 in |
| Total Legroom | 83.6 in (over 2 rows) | 84.5 in (over 2 rows) | -0.9 in |
| Cargo Volume | 14.6 ft3 | 16.3 ft3 | -1.7 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 2018 Mercedes-Benz S-Class.