2003 BMW 645 vs. 2004 Hummer H1
To start off, 2004 Hummer H1 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 6,504 cc (8 cylinders), 2004 Hummer H1 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (310 HP) has 105 more horse power than 2004 Hummer H1. (205 HP). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2004 Hummer H1. With that said, vehicle weight also plays an important factor in acceleration. 2004 Hummer H1 weights approximately 1574 kg more than 2003 BMW 645.
Because 2004 Hummer H1 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 645. In wet, icy, snow, or gravel driving conditions, 2004 Hummer H1 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 Hummer H1 (597 Nm) has 147 more torque (in Nm) than 2003 BMW 645. (450 Nm). This means 2004 Hummer H1 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2003 BMW 645 | 2004 Hummer H1 | |
| Make | BMW | Hummer |
| Model | 645 | H1 |
| Year Released | 2003 | 2004 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 6504 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 310 HP | 205 HP |
| Torque | 450 Nm | 597 Nm |
| Engine Bore Size | 92 mm | 103 mm |
| Engine Stroke Size | 82.7 mm | 97 mm |
| Engine Compression Ratio | 10.5:1 | 20.2:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1698 kg | 3272 kg |
| Vehicle Length | 4830 mm | 4690 mm |
| Vehicle Width | 1860 mm | 2200 mm |
| Vehicle Height | 1380 mm | 1960 mm |
| Wheelbase Size | 2790 mm | 3310 mm |
| Fuel Tank Capacity | 70 L | 159 L |
