| Model Year | 2015 | 2020 | |
| Model | Audi A5 / S5 / RS5 | Mercedes-Benz C-Class | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 2dr Coupe | 2dr Coupe | |
| Difference | |||
| Wheelbase | 108.3 in | 111.8 in | -3.5 in |
| Length | 182.1 in | 184.5 in | -2.4 in |
| Width | 73.0 in | 71.3 in | 1.7 in |
| Height | 54.0 in | 55.3 in | -1.3 in |
| Curb Weight | 3682 lb. | 3527 lb. | 155 lb. |
| Fuel Capacity | 16.9 gal. | 17.4 gal. | -0.5 gal. |
| Headroom, Row 1 | 39.1 in | 38.8 in | 0.3 in |
| Shoulder Room, Row 1 | 54.3 in | 54.8 in | -0.5 in |
| Legroom, Row 1 | 41.3 in | 42.0 in | -0.7 in |
| Headroom, Row 2 | 36.0 in | 35.6 in | 0.4 in |
| Shoulder Room, Row 2 | 52.8 in | 51.7 in | 1.1 in |
| Legroom, Row 2 | 31.7 in | 32.0 in | -0.3 in |
| Total Legroom | 73 in (over 2 rows) | 74 in (over 2 rows) | -1 in |
| Cargo Volume | 12.2 ft3 | 10.5 ft3 | 1.7 ft3 |
None of our members have yet commented on the seat room and comfort of the 2015 Audi A5 / S5 / RS5.
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz C-Class.