2008 Cadillac STS vs. 2007 Hummer H3
To start off, 2008 Cadillac STS is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Hummer H3. In addition, the cost of maintenance, including insurance, on 2007 Hummer H3 would be higher. At 4,565 cc (8 cylinders), 2008 Cadillac STS is equipped with a bigger engine. In terms of performance, 2008 Cadillac STS (321 HP @ 6400 RPM) has 79 more horse power than 2007 Hummer H3. (242 HP @ 5600 RPM). In normal driving conditions, 2008 Cadillac STS should accelerate faster than 2007 Hummer H3.
Because 2007 Hummer H3 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Cadillac STS. In wet, icy, snow, or gravel driving conditions, 2007 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 Cadillac STS (427 Nm @ 4400 RPM) has 99 more torque (in Nm) than 2007 Hummer H3. (328 Nm @ 4600 RPM). This means 2008 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2007 Hummer H3. 2008 Cadillac STS has automatic transmission and 2007 Hummer H3 has manual transmission. 2007 Hummer H3 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Cadillac STS | 2007 Hummer H3 | |
| Make | Cadillac | Hummer |
| Model | STS | H3 |
| Year Released | 2008 | 2007 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 3699 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Horse Power | 321 HP | 242 HP |
| Engine RPM | 6400 RPM | 5600 RPM |
| Torque | 427 Nm | 328 Nm |
| Torque RPM | 4400 RPM | 4600 RPM |
| Engine Bore Size | 93 mm | 95.5 mm |
| Engine Stroke Size | 84 mm | 101.6 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Manual |
| 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 |
