2003 BMW 645 vs. 2007 BMW X3
To start off, 2007 BMW X3 is newer by 4 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 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (310 HP @ 6000 RPM) has 42 more horse power than 2007 BMW X3. (268 HP @ 6600 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2007 BMW X3. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X3 weights approximately 117 kg more than 2003 BMW 645.
Because 2007 BMW X3 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, 2007 BMW X3 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 135 more torque (in Nm) than 2007 BMW X3. (315 Nm @ 2750 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW X3.
Compare all specifications:
2003 BMW 645 | 2007 BMW X3 | |
Make | BMW | BMW |
Model | 645 | X3 |
Year Released | 2003 | 2007 |
Body Type | Coupe | SUV |
Engine Position | Front | Front |
Engine Size | 4398 cc | 2996 cc |
Engine Cylinders | 8 cylinders | 6 cylinders |
Engine Type | V | in-line |
Valves per Cylinder | 4 valves | 4 valves |
Horse Power | 310 HP | 268 HP |
Engine RPM | 6000 RPM | 6600 RPM |
Torque | 450 Nm | 315 Nm |
Torque RPM | 3600 RPM | 2750 RPM |
Engine Bore Size | 92 mm | 85 mm |
Engine Stroke Size | 82.7 mm | 88 mm |
Engine Compression Ratio | 10.5:1 | 10.7:1 |
Top Speed | 250 km/hour | 210 km/hour |
Acceleration 0-100mph | 5.9 seconds | 7.8 seconds |
Drive Type | Rear | 4WD |
Transmission Type | Automatic | Automatic |
Number of Seats | 4 seats | 5 seats |
Number of Doors | 2 doors | 5 doors |
Vehicle Weight | 1698 kg | 1815 kg |
Vehicle Length | 4830 mm | 4570 mm |
Vehicle Width | 1860 mm | 1680 mm |
Vehicle Height | 1380 mm | 1860 mm |
Wheelbase Size | 2790 mm | 2800 mm |
Fuel Consumption Overall | 10.9 L/100km | 10.3 L/100km |
Fuel Tank Capacity | 70 L | 67 L |