2008 Hummer H2 vs. 2005 BMW 645
To start off, 2008 Hummer H2 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 would be higher. At 6,162 cc (8 cylinders), 2008 Hummer H2 is equipped with a bigger engine. In terms of performance, 2008 Hummer H2 (393 HP @ 5700 RPM) has 55 more horse power than 2005 BMW 645. (338 HP @ 6100 RPM). In normal driving conditions, 2008 Hummer H2 should accelerate faster than 2005 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2008 Hummer H2 weights approximately 1188 kg more than 2005 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Hummer H2 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW 645. In wet, icy, snow, or gravel driving conditions, 2008 Hummer H2 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 H2 (563 Nm @ 4400 RPM) has 124 more torque (in Nm) than 2005 BMW 645. (439 Nm @ 3600 RPM). This means 2008 Hummer H2 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 645.
Compare all specifications:
| 2008 Hummer H2 | 2005 BMW 645 | |
| Make | Hummer | BMW |
| Model | H2 | 645 |
| Year Released | 2008 | 2005 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 6162 cc | 4390 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 393 HP | 338 HP |
| Engine RPM | 5700 RPM | 6100 RPM |
| Torque | 563 Nm | 439 Nm |
| Torque RPM | 4400 RPM | 3600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 2903 kg | 1715 kg |
| Vehicle Length | 5180 mm | 4830 mm |
| Vehicle Width | 2070 mm | 1860 mm |
| Vehicle Height | 2000 mm | 1380 mm |
| Wheelbase Size | 3130 mm | 2790 mm |
| Fuel Consumption Overall | 15.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 121 L | 70 L |
