| Model Year | 2011 | 2015 | |
| Model | Volvo S40 | BMW Z4 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 2dr Hardtop conv. | |
| Difference | |||
| Wheelbase | 103.9 in | 98.3 in | 5.6 in |
| Length | 176.2 in | 166.9 in | 9.3 in |
| Width | 69.7 in | 70.5 in | -0.8 in |
| Height | 57.2 in | 50.8 in | 6.4 in |
| Curb Weight | 3363 lb. | 3263 lb. | 100 lb. |
| Fuel Capacity | 15.9 gal. | 14.5 gal. | 1.4 gal. |
| Headroom, Row 1 | 38.9 in | 39.1 in | -0.2 in |
| Shoulder Room, Row 1 | 55.2 in | 53.3 in | 1.9 in |
| Hip Room, Row 1 | 53.7 in | 0.0 in | 53.7 in |
| Legroom, Row 1 | 41.6 in | 42.2 in | -0.6 in |
| Headroom, Row 2 | 37.2 in | 0.0 in | 37.2 in |
| Shoulder Room, Row 2 | 54.1 in | 0.0 in | 54.1 in |
| Hip Room, Row 2 | 50.7 in | 0.0 in | 50.7 in |
| Legroom, Row 2 | 34.4 in | 0.0 in | 34.4 in |
| Total Legroom | 76 in (over 2 rows) | 42.2 in (over 1 rows) | 33.8 in |
| Cargo Volume | 14.3 ft3 | 10.9 ft3 | 3.4 ft3 |
None of our members have yet commented on the seat room and comfort of the 2011 Volvo S40.
None of our members have yet commented on the seat room and comfort of the 2015 BMW Z4.