| Model Year | 2010 | 2020 | |
| Model | Chevrolet HHR | Cadillac CT6 | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Wagon | 4dr Sedan | |
| Difference | |||
| Wheelbase | 103.5 in | 122.4 in | -18.9 in |
| Length | 176.2 in | 205.8 in | -29.6 in |
| Width | 69.1 in | 74.0 in | -4.9 in |
| Height | 63.1 in | 58.0 in | 5.1 in |
| Curb Weight | 3155 lb. | 4063 lb. | -908 lb. |
| Fuel Capacity | 16.0 gal. | 19.5 gal. | -3.5 gal. |
| Headroom, Row 1 | 39.6 in | 40.2 in | -0.6 in |
| Shoulder Room, Row 1 | 53.5 in | 58.3 in | -4.8 in |
| Hip Room, Row 1 | 50.1 in | 55.9 in | -5.8 in |
| Legroom, Row 1 | 40.6 in | 42.3 in | -1.7 in |
| Headroom, Row 2 | 39.0 in | 38.0 in | 1 in |
| Shoulder Room, Row 2 | 52.7 in | 56.2 in | -3.5 in |
| Hip Room, Row 2 | 50.6 in | 53.5 in | -2.9 in |
| Legroom, Row 2 | 39.5 in | 40.4 in | -0.9 in |
| Total Legroom | 80.1 in (over 2 rows) | 82.7 in (over 2 rows) | -2.6 in |
| Cargo Volume, Minimum | 23.8 ft3 | 15.3 ft3 | 8.5 ft3 |
| Cargo Volume, Maximum | 57.7 ft3 | 15.3 ft3 | 42.4 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 2020 Cadillac CT6.