| Model Year | 2010 | 2021 | |
| Model | Audi A6 / S6 | Audi R8 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 2dr Coupe | |
| Difference | |||
| Wheelbase | 111.9 in | 104.3 in | 7.6 in |
| Length | 193.5 in | 174.4 in | 19.1 in |
| Width | 73.0 in | 76.4 in | -3.4 in |
| Height | 57.5 in | 48.7 in | 8.8 in |
| Curb Weight | 4123 lb. | 3594 lb. | 529 lb. |
| Fuel Capacity | 21.1 gal. | 21.9 gal. | -0.8 gal. |
| Headroom, Row 1 | 38.7 in | 38.5 in | 0.2 in |
| Shoulder Room, Row 1 | 57.1 in | 55.1 in | 2 in |
| Legroom, Row 1 | 41.3 in | 40.9 in | 0.4 in |
| Headroom, Row 2 | 37.8 in | 0.0 in | 37.8 in |
| Shoulder Room, Row 2 | 55.9 in | 0.0 in | 55.9 in |
| Legroom, Row 2 | 36.9 in | 0.0 in | 36.9 in |
| Total Legroom | 78.2 in (over 2 rows) | 40.9 in (over 1 rows) | 37.3 in |
| Cargo Volume, Minimum | 15.9 ft3 | 4.0 ft3 | 11.9 ft3 |
| Cargo Volume, Maximum | 15.9 ft3 | 8.0 ft3 | 7.9 ft3 |
| 2010 Audi A6 / S6 Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2011 | 4dr Sedan supercharged 300hp 3.0L V6 6-speed shiftable automatic AWD |
Rear seat room is average, no better. see full Audi A6 / S6 review |
None of our members have yet commented on the seat room and comfort of the 2021 Audi R8.