| Model Year | 2014 | 2015 | |
| Model | BMW 4-Series | Mercedes-Benz M-Class | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 2dr Coupe | 4dr SUV | |
| Difference | |||
| Wheelbase | 110.6 in | 114.8 in | -4.2 in |
| Length | 182.6 in | 189.1 in | -6.5 in |
| Width | 71.9 in | 75.2 in | -3.3 in |
| Height | 54.2 in | 70.7 in | -16.5 in |
| Curb Weight | 3470 lb. | 4751 lb. | -1281 lb. |
| Fuel Capacity | 15.8 gal. | 24.6 gal. | -8.8 gal. |
| Headroom, Row 1 | 39.8 in | 38.9 in | 0.9 in |
| Shoulder Room, Row 1 | 55.3 in | 58.5 in | -3.2 in |
| Legroom, Row 1 | 42.2 in | 40.3 in | 1.9 in |
| Headroom, Row 2 | 36.1 in | 38.5 in | -2.4 in |
| Shoulder Room, Row 2 | 51.7 in | 58.4 in | -6.7 in |
| Legroom, Row 2 | 33.7 in | 38.4 in | -4.7 in |
| Total Legroom | 75.9 in (over 2 rows) | 78.7 in (over 2 rows) | -2.8 in |
| Cargo Volume, Minimum | 15.7 ft3 | 36.2 ft3 | -20.5 ft3 |
| Cargo Volume, Maximum | 15.7 ft3 | 71.0 ft3 | -55.3 ft3 |
None of our members have yet commented on the seat room and comfort of the 2014 BMW 4-Series.
None of our members have yet commented on the seat room and comfort of the 2015 Mercedes-Benz M-Class.