2004 BMW X5 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 BMW X5. In addition, the cost of maintenance, including insurance, on 2004 BMW X5 would be higher. At 4,390 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (338 HP @ 6100 RPM) has 110 more horse power than 2004 BMW X5. (228 HP @ 7400 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2004 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW X5 weights approximately 395 kg more than 2005 BMW 645.
Because 2004 BMW X5 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, 2004 BMW X5 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, 2005 BMW 645 (439 Nm) has 149 more torque (in Nm) than 2004 BMW X5. (290 Nm). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW X5.
Compare all specifications:
| 2004 BMW X5 | 2005 BMW 645 | |
| Make | BMW | BMW |
| Model | X5 | 645 |
| Year Released | 2004 | 2005 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2978 cc | 4390 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 228 HP | 338 HP |
| Engine RPM | 7400 RPM | 6100 RPM |
| Torque | 290 Nm | 439 Nm |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 83 mm |
| Engine Compression Ratio | 10.2:1 | 10.5:1 |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2110 kg | 1715 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1880 mm | 1860 mm |
| Vehicle Height | 1770 mm | 1380 mm |
| Wheelbase Size | 2940 mm | 2790 mm |
| Fuel Consumption Highway | 11.2 L/100km | 9.4 L/100km |
| Fuel Consumption City | 15.7 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 13.8 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 92 L | 70 L |
