2004 BMW 645 vs. 2008 Hummer H3
To start off, 2008 Hummer H3 is newer by 4 year(s). Which means there will be less support and parts availability for 2004 BMW 645. In addition, the cost of maintenance, including insurance, on 2004 BMW 645 would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2008 Hummer H3 weights approximately 516 kg more than 2004 BMW 645.
Because 2008 Hummer H3 is four wheel drive (4WD), it will have significant more traction and grip than 2004 BMW 645. 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, 2004 BMW 645 (447 Nm) has 119 more torque (in Nm) than 2008 Hummer H3. (328 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Hummer H3.
Compare all specifications:
| 2004 BMW 645 | 2008 Hummer H3 | |
| Make | BMW | Hummer |
| Model | 645 | H3 |
| Year Released | 2004 | 2008 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 3653 cc |
| Engine Cylinders | 8 cylinders | 5 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 322 HP | 0 HP |
| Torque | 447 Nm | 328 Nm |
| Engine Bore Size | 92 mm | 95.5 mm |
| Engine Stroke Size | 83 mm | 102 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1715 kg | 2231 kg |
| Vehicle Length | 4840 mm | 4750 mm |
| Vehicle Height | 1380 mm | 2020 mm |
| Wheelbase Size | 2790 mm | 2850 mm |
| Fuel Tank Capacity | 70 L | 87 L |
