| Model Year | 2008 | 2010 | |
| Model | Audi A8 / S8 | Infiniti QX | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 121.0 in | 123.2 in | -2.2 in |
| Length | 204.4 in | 206.9 in | -2.5 in |
| Width | 74.6 in | 78.8 in | -4.2 in |
| Height | 57.3 in | 77.0 in | -19.7 in |
| Curb Weight | 4399 lb. | 5597 lb. | -1198 lb. |
| Fuel Capacity | 23.8 gal. | 28.0 gal. | -4.2 gal. |
| Headroom, Row 1 | 37.4 in | 41.0 in | -3.6 in |
| Shoulder Room, Row 1 | 59.1 in | 65.1 in | -6 in |
| Hip Room, Row 1 | 0.0 in | 61.3 in | -61.3 in |
| Legroom, Row 1 | 41.3 in | 41.8 in | -0.5 in |
| Headroom, Row 2 | 38.3 in | 40.0 in | -1.7 in |
| Shoulder Room, Row 2 | 57.5 in | 64.5 in | -7 in |
| Hip Room, Row 2 | 0.0 in | 60.1 in | -60.1 in |
| Legroom, Row 2 | 42.3 in | 41.9 in | 0.4 in |
| Headroom, Row 3 | 0.0 in | 35.9 in | -35.9 in |
| Shoulder Room, Row 3 | 0.0 in | 63.7 in | -63.7 in |
| Hip Room, Row 3 | 0.0 in | 48.8 in | -48.8 in |
| Legroom, Row 3 | 0.0 in | 32.2 in | -32.2 in |
| Total Legroom | 83.6 in (over 2 rows) | 115.9 in (over 3 rows) | -32.3 in |
| Cargo Volume, Minimum | 14.6 ft3 | 20.0 ft3 | -5.4 ft3 |
| Cargo Volume, Behind R2 | 14.6 | 61.2 ft3 | -46.6 |
| Cargo Volume, Maximum | 14.6 ft3 | 97.1 ft3 | -82.5 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 2010 Infiniti QX.