| Model Year | 2017 | 2020 | |
| Model | BMW 4-Series | Mercedes-Benz GLB | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 2dr Coupe | 4dr SUV | |
| Difference | |||
| Wheelbase | 110.6 in | 111.4 in | -0.8 in |
| Length | 182.6 in | 182.4 in | 0.2 in |
| Width | 71.9 in | 72.2 in | -0.3 in |
| Height | 54.2 in | 65.3 in | -11.1 in |
| Curb Weight | 3558 lb. | 3638 lb. | -80 lb. |
| Fuel Capacity | 15.8 gal. | 15.9 gal. | -0.1 gal. |
| Headroom, Row 1 | 39.8 in | 40.7 in | -0.9 in |
| Shoulder Room, Row 1 | 55.3 in | 55.9 in | -0.6 in |
| Legroom, Row 1 | 42.2 in | 41.1 in | 1.1 in |
| Headroom, Row 2 | 36.1 in | 39.3 in | -3.2 in |
| Shoulder Room, Row 2 | 51.7 in | 54.9 in | -3.2 in |
| Legroom, Row 2 | 33.7 in | 38.1 in | -4.4 in |
| Headroom, Row 3 | 0.0 in | 34.8 in | -34.8 in |
| Shoulder Room, Row 3 | 0.0 in | 43.8 in | -43.8 in |
| Legroom, Row 3 | 0.0 in | 29.1 in | -29.1 in |
| Total Legroom | 75.9 in (over 2 rows) | 108.3 in (over 3 rows) | -32.4 in |
| Cargo Volume, Minimum | 15.7 ft3 | 22.0 ft3 | -6.3 ft3 |
| Cargo Volume, Maximum | 15.7 ft3 | 62.0 ft3 | -46.3 ft3 |
None of our members have yet commented on the seat room and comfort of the 2017 BMW 4-Series.
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz GLB.