2007 Cadillac STS vs. 2008 Hummer H3
To start off, 2008 Hummer H3 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS would be higher. At 5,328 cc (8 cylinders), 2008 Hummer H3 is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (321 HP @ 6400 RPM) has 21 more horse power than 2008 Hummer H3. (300 HP @ 5200 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2008 Hummer H3.
Because 2008 Hummer H3 is four wheel drive (4WD), it will have significant more traction and grip than 2007 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 2008 Hummer H3 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2008 Hummer H3 (434 Nm @ 4000 RPM) has 7 more torque (in Nm) than 2007 Cadillac STS. (427 Nm @ 4400 RPM). This means 2008 Hummer H3 will have an easier job in driving up hills or pulling heavy equipment than 2007 Cadillac STS.
Compare all specifications:
| 2007 Cadillac STS | 2008 Hummer H3 | |
| Make | Cadillac | Hummer |
| Model | STS | H3 |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 5328 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Horse Power | 321 HP | 300 HP |
| Engine RPM | 6400 RPM | 5200 RPM |
| Torque | 427 Nm | 434 Nm |
| Torque RPM | 4400 RPM | 4000 RPM |
| Engine Compression Ratio | 10.5:1 | 9.9:1 |
| Drive Type | Front | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4990 mm | 4750 mm |
| Vehicle Width | 1850 mm | 2180 mm |
| Vehicle Height | 1470 mm | 1900 mm |
| Wheelbase Size | 2960 mm | 2850 mm |
| Fuel Tank Capacity | 64 L | 87 L |
