| Model Year | 2010 | 2021 | |
| Model | Chevrolet HHR | Ford Mustang | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Wagon | 2dr Convertible | |
| Difference | |||
| Wheelbase | 103.5 in | 107.1 in | -3.6 in |
| Length | 176.2 in | 188.5 in | -12.3 in |
| Width | 69.1 in | 75.4 in | -6.3 in |
| Height | 63.1 in | 54.9 in | 8.2 in |
| Curb Weight | 3155 lb. | 3636 lb. | -481 lb. |
| Fuel Capacity | 16.0 gal. | 15.5 gal. | 0.5 gal. |
| Headroom, Row 1 | 39.6 in | 37.6 in | 2 in |
| Shoulder Room, Row 1 | 53.5 in | 56.3 in | -2.8 in |
| Hip Room, Row 1 | 50.1 in | 54.9 in | -4.8 in |
| Legroom, Row 1 | 40.6 in | 42.7 in | -2.1 in |
| Headroom, Row 2 | 39.0 in | 35.7 in | 3.3 in |
| Shoulder Room, Row 2 | 52.7 in | 44.7 in | 8 in |
| Hip Room, Row 2 | 50.6 in | 43.7 in | 6.9 in |
| Legroom, Row 2 | 39.5 in | 29.2 in | 10.3 in |
| Total Legroom | 80.1 in (over 2 rows) | 71.9 in (over 2 rows) | 8.2 in |
| Cargo Volume, Minimum | 23.8 ft3 | 11.4 ft3 | 12.4 ft3 |
| Cargo Volume, Maximum | 57.7 ft3 | 11.4 ft3 | 46.3 ft3 |
| 2010 Chevrolet HHR Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2009 | 4dr Wagon 155-horsepower 2.2L I4 4-speed automatic FWD |
It is roomy and comfortable. see full Chevrolet HHR review |
| 2009 | 4dr Wagon 155-horsepower 2.2L I4 4-speed automatic FWD |
The HHR has one of the most comfortable seats for me of most of the cars that I have driven. see full Chevrolet HHR review |
| 2010 Chevrolet HHR Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2009 | 4dr Wagon 172-horsepower 2.4L I4 5-speed manual FWD |
little leg room see full Chevrolet HHR review |
| 2009 | 4dr Wagon 172-horsepower 2.4L I4 4-speed automatic FWD |
seat-back very annoying and driving position difficult to get right see full Chevrolet HHR review |
| 2009 | 4dr Wagon 172-horsepower 2.4L I4 4-speed automatic FWD |
low roof limits passenger packaging space - poor knee room see full Chevrolet HHR review |
None of our members have yet commented on the seat room and comfort of the 2021 Ford Mustang.