| Model Year | 2010 | 2015 | |
| Model | Mercedes-Benz M-Class | Audi R8 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 2dr Coupe | |
| Difference | |||
| Wheelbase | 114.7 in | 104.3 in | 10.4 in |
| Length | 188.5 in | 175.0 in | 13.5 in |
| Width | 75.2 in | 75.0 in | 0.2 in |
| Height | 70.1 in | 49.3 in | 20.8 in |
| Curb Weight | 4705 lb. | 3583 lb. | 1122 lb. |
| Fuel Capacity | 25.1 gal. | 23.8 gal. | 1.3 gal. |
| Headroom, Row 1 | 39.9 in | 37.7 in | 2.2 in |
| Shoulder Room, Row 1 | 59.9 in | 54.8 in | 5.1 in |
| Hip Room, Row 1 | 55.9 in | 0.0 in | 55.9 in |
| Legroom, Row 1 | 42.2 in | 41.0 in | 1.2 in |
| Headroom, Row 2 | 39.8 in | 0.0 in | 39.8 in |
| Shoulder Room, Row 2 | 59.8 in | 0.0 in | 59.8 in |
| Hip Room, Row 2 | 56.2 in | 0.0 in | 56.2 in |
| Legroom, Row 2 | 40.0 in | 0.0 in | 40 in |
| Total Legroom | 82.2 in (over 2 rows) | 41 in (over 1 rows) | 41.2 in |
| Cargo Volume, Minimum | 29.4 ft3 | 3.5 ft3 | 25.9 ft3 |
| Cargo Volume, Maximum | 72.4 ft3 | 3.5 ft3 | 68.9 ft3 |
None of our members have yet commented on the seat room and comfort of the 2010 Mercedes-Benz M-Class.
None of our members have yet commented on the seat room and comfort of the 2015 Audi R8.