2007 BMW X3 vs. 2003 BMW 320
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 320. In addition, the cost of maintenance, including insurance, on 2003 BMW 320 would be higher. Both 2007 BMW X3 and 2003 BMW 320 are equipped with a 1,995 cc engine. In terms of performance, 2007 BMW X3 (149 HP @ 4000 RPM) has 1 more horse power than 2003 BMW 320. (148 HP @ 5900 RPM). In normal driving conditions, 2007 BMW X3 should accelerate faster than 2003 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X3 weights approximately 275 kg more than 2003 BMW 320. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 320. 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, 2007 BMW X3 (330 Nm @ 2000 RPM) has 120 more torque (in Nm) than 2003 BMW 320. (210 Nm @ 3750 RPM). This means 2007 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 320.
Compare all specifications:
| 2007 BMW X3 | 2003 BMW 320 | |
| Make | BMW | BMW |
| Model | X3 | 320 |
| Year Released | 2007 | 2003 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 1995 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 149 HP | 148 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 330 Nm | 210 Nm |
| Torque RPM | 2000 RPM | 3750 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 90 mm | 90 mm |
| Engine Compression Ratio | 17.0:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1740 kg | 1465 kg |
| Vehicle Length | 4570 mm | 4490 mm |
| Vehicle Width | 1680 mm | 1760 mm |
| Vehicle Height | 1860 mm | 1380 mm |
| Wheelbase Size | 2800 mm | 2730 mm |
| Fuel Tank Capacity | 67 L | 63 L |
