| Model Year | 2007 | 2021 | |
| Model | Infiniti FX | Audi A8 / S8 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr SUV | 4dr Sedan, ext. | |
| Difference | |||
| Wheelbase | 112.2 in | 123.2 in | -11 in |
| Length | 189.1 in | 208.7 in | -19.6 in |
| Width | 75.8 in | 76.6 in | -0.8 in |
| Height | 65.9 in | 58.6 in | 7.3 in |
| Curb Weight | 4187 lb. | 4773 lb. | -586 lb. |
| Fuel Capacity | 23.8 gal. | 21.7 gal. | 2.1 gal. |
| Headroom, Row 1 | 40.8 in | 38.3 in | 2.5 in |
| Shoulder Room, Row 1 | 56.9 in | 59.1 in | -2.2 in |
| Hip Room, Row 1 | 54.3 in | 0.0 in | 54.3 in |
| Legroom, Row 1 | 43.9 in | 41.5 in | 2.4 in |
| Headroom, Row 2 | 39.5 in | 38.5 in | 1 in |
| Shoulder Room, Row 2 | 57.4 in | 57.6 in | -0.2 in |
| Hip Room, Row 2 | 55.0 in | 0.0 in | 55 in |
| Legroom, Row 2 | 35.2 in | 44.3 in | -9.1 in |
| Total Legroom | 79.1 in (over 2 rows) | 85.8 in (over 2 rows) | -6.7 in |
| Cargo Volume, Minimum | 27.4 ft3 | 12.5 ft3 | 14.9 ft3 |
| Cargo Volume, Maximum | 64.5 ft3 | 12.5 ft3 | 52 ft3 |
| 2007 Infiniti FX Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2008 | 4dr SUV 275-horsepower 3.5L V6 5-speed shiftable automatic AWD |
Longest drive was 6 hours and had no discomfort whatsoever. Have ridden for 4 hours in a Toyota Rav4 and was almost in pain after an hour. see full Infiniti FX review |
| 2007 Infiniti FX Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2007 | 4dr SUV 275-horsepower 3.5L V6 5-speed shiftable automatic AWD |
the rear seats are great for kids, but not for adults. not lots of leg room. head and shoulder room is fine. see full Infiniti FX review |
None of our members have yet commented on the seat room and comfort of the 2021 Audi A8 / S8.