| Model Year | 2020 | 2021 | |
| Model | Mercedes-Benz GLB | Audi A8 / S8 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 4dr Sedan, ext. | |
| Difference | |||
| Wheelbase | 2,830 mm | 3,129 mm | -1 mm |
| Length | 4,633 mm | 5,301 mm | -1 mm |
| Width | 1,834 mm | 1,946 mm | 0 mm |
| Height | 1,659 mm | 1,488 mm | 0 mm |
| Curb Weight | 1,650 kg | 2,165 kg | -1 kg |
| Fuel Capacity | 60 L | 82 L | -22 L |
| Headroom, Row 1 | 1,034 mm | 973 mm | -972 mm |
| Shoulder Room, Row 1 | 1,420 mm | 1,501 mm | 0 mm |
| Legroom, Row 1 | 1,044 mm | 1,054 mm | 0 mm |
| Headroom, Row 2 | 998 mm | 978 mm | 20 mm |
| Shoulder Room, Row 2 | 1,394 mm | 1,463 mm | 0 mm |
| Legroom, Row 2 | 968 mm | 1,125 mm | 967 mm |
| Headroom, Row 3 | 884 mm | 0 mm | 884 mm |
| Shoulder Room, Row 3 | 1,113 mm | 0 mm | 1 mm |
| Legroom, Row 3 | 739 mm | 0 mm | 739 mm |
| Total Legroom | 2,751 mm (over 3 rows) | 2,179 mm (over 2 rows) | 0 mm |
| Cargo Volume, Minimum | 623 L | 354 L | 269 L |
| Cargo Volume, Maximum | 1,756 L | 12.5 | -11.5 L |
None of our members have yet commented on the seat room and comfort of the 2020 Mercedes-Benz GLB.
None of our members have yet commented on the seat room and comfort of the 2021 Audi A8 / S8.