2007 Cadillac STS vs. 2009 Hummer H3
To start off, 2009 Hummer H3 is newer by 2 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 4,565 cc (8 cylinders), 2007 Cadillac STS is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (320 HP @ 6400 RPM) has 78 more horse power than 2009 Hummer H3. (242 HP @ 5600 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2009 Hummer H3. With that said, vehicle weight also plays an important factor in acceleration. 2009 Hummer H3 weights approximately 628 kg more than 2007 Cadillac STS.
Because 2009 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, 2009 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, 2007 Cadillac STS (427 Nm @ 4400 RPM) has 99 more torque (in Nm) than 2009 Hummer H3. (328 Nm @ 4600 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2009 Hummer H3.
Compare all specifications:
| 2007 Cadillac STS | 2009 Hummer H3 | |
| Make | Cadillac | Hummer |
| Model | STS | H3 |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 3653 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 242 HP |
| Engine RPM | 6400 RPM | 5600 RPM |
| Torque | 427 Nm | 328 Nm |
| Torque RPM | 4400 RPM | 4600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1566 kg | 2194 kg |
| Vehicle Length | 4990 mm | 4790 mm |
| Vehicle Width | 1850 mm | 1900 mm |
| Vehicle Height | 1470 mm | 2000 mm |
| Wheelbase Size | 2960 mm | 2850 mm |
| Fuel Consumption Overall | 11.8 L/100km | 13.9 L/100km |
| Fuel Tank Capacity | 64 L | 87 L |
