| Model Year | 2008 | 2015 | |
| Model | Audi A8 / S8 | Mercedes-Benz GL | |
| Engine | 5.2L V10 DOHC-4v 450 hp@7000 398 lb-ft@3500 |
turbocharged 5.5L V8 DOHC-4v 550 hp@5750 560 lb-ft@2000 |
|
| Transmission | 6-speed shiftable automatic | 7-speed shiftable automatic | |
| Drivetrain | AWD | AWD | |
| Body | 4dr Sedan, ext. | 4dr SUV | |
| Difference | |||
| Wheelbase | 121.0 in | 121.0 in | 0 in |
| Length | 204.4 in | 201.6 in | 2.8 in |
| Width | 74.6 in | 76.4 in | -1.8 in |
| Height | 57.3 in | 72.8 in | -15.5 in |
| Curb Weight | 4697 lb. | 5687 lb. | -990 lb. |
| Fuel Capacity | 23.8 gal. | 26.4 gal. | -2.6 gal. |
| Headroom, Row 1 | 37.4 in | 41.2 in | -3.8 in |
| Shoulder Room, Row 1 | 59.1 in | 58.5 in | 0.6 in |
| Legroom, Row 1 | 41.3 in | 40.3 in | 1 in |
| Headroom, Row 2 | 38.3 in | 40.0 in | -1.7 in |
| Shoulder Room, Row 2 | 57.5 in | 58.3 in | -0.8 in |
| Legroom, Row 2 | 42.3 in | 38.5 in | 3.8 in |
| Headroom, Row 3 | 0.0 in | 38.9 in | -38.9 in |
| Shoulder Room, Row 3 | 0.0 in | 50.5 in | -50.5 in |
| Legroom, Row 3 | 0.0 in | 35.0 in | -35 in |
| Total Legroom | 83.6 in (over 2 rows) | 113.8 in (over 3 rows) | -30.2 in |
| Cargo Volume, Minimum | 14.6 ft3 | 16.0 ft3 | -1.4 ft3 |
| Cargo Volume, Behind R2 | 14.6 | 49.4 ft3 | -34.8 |
| Cargo Volume, Maximum | 14.6 ft3 | 93.8 ft3 | -79.2 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 2015 Mercedes-Benz GL.