2008 BMW X5 vs. 2003 BMW 645
To start off, 2008 BMW X5 is newer by 5 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 4,619 cc, 2008 BMW X5 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X5 weights approximately 490 kg more than 2003 BMW 645.
Because 2008 BMW X5 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, 2008 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, 2008 BMW X5 (480 Nm @ 3700 RPM) has 30 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2008 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645. 2008 BMW X5 has automatic transmission and 2003 BMW 645 has manual transmission. 2003 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 BMW X5 | 2003 BMW 645 | |
| Make | BMW | BMW |
| Model | X5 | 645 |
| Year Released | 2008 | 2003 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4619 cc | 4398 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 0 HP | 325 HP |
| Torque | 480 Nm | 450 Nm |
| Torque RPM | 3700 RPM | 3600 RPM |
| Engine Bore Size | 93.1 mm | 92 mm |
| Engine Stroke Size | 85 mm | 82.7 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Acceleration 0-100mph | 6.5 seconds | 5.9 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2180 kg | 1690 kg |
| Vehicle Width | 1880 mm | 1860 mm |
| Wheelbase Size | 2830 mm | 2890 mm |
| Fuel Consumption Overall | 14.9 L/100km | 11.7 L/100km |
| Fuel Tank Capacity | 93 L | 70 L |
