| Model Year | 2017 | 2020 | |
| Model | Mercedes-Benz B-Class | BMW 3-Series | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Hatch | 4dr Sedan | |
| Difference | |||
| Wheelbase | 106.3 in | 112.2 in | -5.9 in |
| Length | 171.6 in | 185.7 in | -14.1 in |
| Width | 70.3 in | 71.9 in | -1.6 in |
| Height | 61.3 in | 56.8 in | 4.5 in |
| Curb Weight | 3924 lb. | 3589 lb. | 335 lb. |
| Fuel Capacity | 0.0 gal. | 15.6 gal. | -15.6 gal. |
| Headroom, Row 1 | 0.0 in | 38.7 in | -38.7 in |
| Shoulder Room, Row 1 | 0.0 in | 56.0 in | -56 in |
| Legroom, Row 1 | 0.0 in | 42.0 in | -42 in |
| Headroom, Row 2 | 0.0 in | 37.6 in | -37.6 in |
| Shoulder Room, Row 2 | 0.0 in | 54.6 in | -54.6 in |
| Legroom, Row 2 | 0.0 in | 35.2 in | -35.2 in |
| Total Legroom | 0 in (over 1 rows) | 77.2 in (over 2 rows) | -77.2 in |
| Cargo Volume, Minimum | 21.0 ft3 | 16.9 ft3 | 4.1 ft3 |
| Cargo Volume, Maximum | 51.4 ft3 | 16.9 ft3 | 34.5 ft3 |
None of our members have yet commented on the seat room and comfort of the 2017 Mercedes-Benz B-Class.
None of our members have yet commented on the seat room and comfort of the 2020 BMW 3-Series.