| Model Year | 2021 | 2009 | |
| Model | Mercedes-Benz A-Class | BMW X5 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 4dr SUV | |
| Difference | |||
| Wheelbase | 107.4 in | 115.5 in | -8.1 in |
| Length | 179.1 in | 191.1 in | -12 in |
| Width | 70.7 in | 76.1 in | -5.4 in |
| Height | 56.9 in | 69.5 in | -12.6 in |
| Curb Weight | 3285 lb. | 4982 lb. | -1697 lb. |
| Fuel Capacity | 13.5 gal. | 23.0 gal. | -9.5 gal. |
| Headroom, Row 1 | 40.3 in | 39.3 in | 1 in |
| Shoulder Room, Row 1 | 55.1 in | 60.0 in | -4.9 in |
| Legroom, Row 1 | 41.8 in | 40.0 in | 1.8 in |
| Headroom, Row 2 | 37.2 in | 39.0 in | -1.8 in |
| Shoulder Room, Row 2 | 54.0 in | 58.0 in | -4 in |
| Legroom, Row 2 | 33.9 in | 36.6 in | -2.7 in |
| Total Legroom | 75.7 in (over 2 rows) | 76.6 in (over 2 rows) | -0.9 in |
| Cargo Volume, Minimum | 8.6 ft3 | 7.1 ft3 | 1.5 ft3 |
| Cargo Volume, Behind R2 | 8.6 | 21.9 ft3 | -13.3 |
| Cargo Volume, Maximum | 8.6 ft3 | 61.8 ft3 | -53.2 ft3 |
None of our members have yet commented on the seat room and comfort of the 2021 Mercedes-Benz A-Class.
None of our members have yet commented on the seat room and comfort of the 2009 BMW X5.