| Model Year | 2015 | 2020 | |
| Model | Audi A4 / S4 | Mercedes-Benz GLA | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 4dr SUV | |
| Difference | |||
| Wheelbase | 110.6 in | 106.3 in | 4.3 in |
| Length | 185.1 in | 173.9 in | 11.2 in |
| Width | 71.9 in | 71.0 in | 0.9 in |
| Height | 56.2 in | 60.0 in | -3.8 in |
| Curb Weight | 3509 lb. | 3296 lb. | 213 lb. |
| Fuel Capacity | 16.9 gal. | 14.8 gal. | 2.1 gal. |
| Headroom, Row 1 | 40.0 in | 40.0 in | 0 in |
| Shoulder Room, Row 1 | 55.5 in | 54.8 in | 0.7 in |
| Legroom, Row 1 | 41.3 in | 41.9 in | -0.6 in |
| Headroom, Row 2 | 37.5 in | 38.4 in | -0.9 in |
| Shoulder Room, Row 2 | 54.3 in | 53.1 in | 1.2 in |
| Legroom, Row 2 | 35.2 in | 33.9 in | 1.3 in |
| Total Legroom | 76.5 in (over 2 rows) | 75.8 in (over 2 rows) | 0.7 in |
| Cargo Volume, Minimum | 12.4 ft3 | 17.2 ft3 | -4.8 ft3 |
| Cargo Volume, Maximum | 12.4 ft3 | 43.6 ft3 | -31.2 ft3 |
None of our members have yet commented on the seat room and comfort of the 2015 Audi A4 / S4.
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz GLA.