| Model Year | 2009 | 2021 | |
| Model | Audi A8 / S8 | Audi A5 / S5 / RS5 | |
| Engine | 5.2L V10 DOHC-4v 450 hp@7000 398 lb-ft@3500 |
turbocharged 2.9L V6 DOHC-4v 444 hp@6700 442 lb-ft@4700 |
|
| Transmission | 6-speed shiftable automatic | 8-speed shiftable automatic | |
| Drivetrain | AWD | AWD | |
| Body | 4dr Sedan, ext. | 4dr Hatch | |
| Difference | |||
| Wheelbase | 121.0 in | 111.1 in | 9.9 in |
| Length | 204.4 in | 187.3 in | 17.1 in |
| Width | 74.6 in | 72.5 in | 2.1 in |
| Height | 57.3 in | 54.5 in | 2.8 in |
| Curb Weight | 4697 lb. | 4057 lb. | 640 lb. |
| Fuel Capacity | 23.8 gal. | 15.3 gal. | 8.5 gal. |
| Headroom, Row 1 | 37.4 in | 37.7 in | -0.3 in |
| Shoulder Room, Row 1 | 59.1 in | 55.7 in | 3.4 in |
| Legroom, Row 1 | 41.3 in | 41.3 in | 0 in |
| Headroom, Row 2 | 38.3 in | 37.0 in | 1.3 in |
| Shoulder Room, Row 2 | 57.5 in | 54.5 in | 3 in |
| Legroom, Row 2 | 42.3 in | 35.1 in | 7.2 in |
| Total Legroom | 83.6 in (over 2 rows) | 76.4 in (over 2 rows) | 7.2 in |
| Cargo Volume, Minimum | 14.6 ft3 | 21.8 ft3 | -7.2 ft3 |
| Cargo Volume, Maximum | 14.6 ft3 | 35.0 ft3 | -20.4 ft3 |
None of our members have yet commented on the seat room and comfort of the 2009 Audi A8 / S8.
None of our members have yet commented on the seat room and comfort of the 2021 Audi A5 / S5 / RS5.