| Model Year | 2017 | 2009 | |
| Model | Chevrolet SS | Chevrolet HHR | |
| Engine | |||
| Transmission | |||
| Drivetrain | |||
| Body | 4dr Sedan | 4dr Wagon | |
| Difference | |||
| Wheelbase | 114.8 in | 103.5 in | 11.3 in |
| Length | 195.5 in | 176.2 in | 19.3 in |
| Width | 74.7 in | 69.1 in | 5.6 in |
| Height | 57.9 in | 63.1 in | -5.2 in |
| Curb Weight | 3997 lb. | 3155 lb. | 842 lb. |
| Fuel Capacity | 18.8 gal. | 16.0 gal. | 2.8 gal. |
| Headroom, Row 1 | 38.7 in | 39.6 in | -0.9 in |
| Shoulder Room, Row 1 | 59.1 in | 53.5 in | 5.6 in |
| Hip Room, Row 1 | 57.2 in | 50.1 in | 7.1 in |
| Legroom, Row 1 | 42.3 in | 40.6 in | 1.7 in |
| Headroom, Row 2 | 38.0 in | 39.0 in | -1 in |
| Shoulder Room, Row 2 | 59.0 in | 52.7 in | 6.3 in |
| Hip Room, Row 2 | 58.0 in | 50.6 in | 7.4 in |
| Legroom, Row 2 | 39.7 in | 39.5 in | 0.2 in |
| Total Legroom | 82 in (over 2 rows) | 80.1 in (over 2 rows) | 1.9 in |
| Cargo Volume, Minimum | 16.4 ft3 | 23.8 ft3 | -7.4 ft3 |
| Cargo Volume, Maximum | 16.4 ft3 | 57.7 ft3 | -41.3 ft3 |
| 2017 Chevrolet SS Seat Room and Comfort: Pros | ||
| Year | Body/Powertrain | Comment |
| 2017 | 4dr Sedan 415-horsepower 6.2L V8 6-speed manual RWD |
Rear seat is functional and roomy. I'm 6'4" and with the drivers seat in my preferred postion there is still a decent amount of legroom behind. Overall much better than the Charger/Challenger. see full Chevrolet SS review |
| 2017 Chevrolet SS Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 2017 | 4dr Sedan 415-horsepower 6.2L V8 6-speed manual RWD |
The front seat is just OK. Feels like a pretty flat bottom and fairly hard. Also, for a car with sporting pretentions there is surprisingly little side bolstering. see full Chevrolet SS review |
| 2009 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 |
| 2008 | 4dr Wagon 172-horsepower 2.4L I4 4-speed automatic FWD |
Roomy enough for 2 adults in the rear seats with plenty of room left behind seat for luggage or gear. see full Chevrolet HHR review |
| 2008 | 4dr Wagon 149-horsepower 2.2L I4 5-speed manual FWD |
2 kids in the back and they have plenty of room see full Chevrolet HHR review |
| 2008 | 4dr Wagon 172-horsepower 2.4L I4 4-speed automatic FWD |
Larger than normal 4-door car see full Chevrolet HHR review |
| 2008 | 4dr Wagon 149-horsepower 2.2L I4 4-speed automatic FWD |
It is adjustable and relaxing. see full Chevrolet HHR review |
| 2009 Chevrolet HHR Seat Room and Comfort: Cons | ||
| Year | Body/Powertrain | Comment |
| 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 |
| 2009 | 4dr Wagon 172-horsepower 2.4L I4 5-speed manual FWD |
little leg room see full Chevrolet HHR review |
| 2008 | 4dr Wagon 172-horsepower 2.4L I4 4-speed automatic FWD |
Could be a bit deeper and more supportive see full Chevrolet HHR review |