2003 BMW X5 vs. 2003 BMW 645
To start off, both 2003 BMW X5 and 2003 BMW 645 were released in the same year (2003). Therefore the support and the availability on parts for both vehicles should be relatively similar. Both 2003 BMW X5 and 2003 BMW 645 are equipped with a 4,398 cc engine. In terms of performance, 2003 BMW X5 (338 HP @ 6100 RPM) has 13 more horse power than 2003 BMW 645. (325 HP @ 6100 RPM). In normal driving conditions, 2003 BMW X5 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X5 weights approximately 505 kg more than 2003 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 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, 2003 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 50 more torque (in Nm) than 2003 BMW X5. (400 Nm @ 3700 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW X5. 2003 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. 2003 BMW X5 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW X5 | 2003 BMW 645 | |
| Make | BMW | BMW |
| Model | X5 | 645 |
| Year Released | 2003 | 2003 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 325 HP |
| Engine RPM | 6100 RPM | 6100 RPM |
| Torque | 400 Nm | 450 Nm |
| Torque RPM | 3700 RPM | 3600 RPM |
| Engine Bore Size | 92 mm | 92 mm |
| Engine Stroke Size | 82.7 mm | 82.7 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Top Speed | 240 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7 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 | 2195 kg | 1690 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1880 mm | 1860 mm |
| Vehicle Height | 1720 mm | 1380 mm |
| Wheelbase Size | 2730 mm | 2890 mm |
| Fuel Consumption Highway | 10.4 L/100km | 8.6 L/100km |
| Fuel Consumption City | 18.3 L/100km | 17.2 L/100km |
| Fuel Consumption Overall | 13.3 L/100km | 11.7 L/100km |
| Fuel Tank Capacity | 93 L | 70 L |
