2003 BMW X3 vs. 2007 BMW 320
To start off, 2007 BMW 320 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 BMW X3. In addition, the cost of maintenance, including insurance, on 2003 BMW X3 would be higher. At 2,494 cc (6 cylinders), 2003 BMW X3 is equipped with a bigger engine. In terms of performance, 2003 BMW X3 (189 HP @ 6000 RPM) has 41 more horse power than 2007 BMW 320. (148 HP @ 6200 RPM). In normal driving conditions, 2003 BMW X3 should accelerate faster than 2007 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW X3 weights approximately 420 kg more than 2007 BMW 320. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 320. In wet, icy, snow, or gravel driving conditions, 2003 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 X3 (245 Nm @ 3500 RPM) has 45 more torque (in Nm) than 2007 BMW 320. (200 Nm @ 3600 RPM). This means 2003 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 320.
Compare all specifications:
| 2003 BMW X3 | 2007 BMW 320 | |
| Make | BMW | BMW |
| Model | X3 | 320 |
| Year Released | 2003 | 2007 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 189 HP | 148 HP |
| Engine RPM | 6000 RPM | 6200 RPM |
| Torque | 245 Nm | 200 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1815 kg | 1395 kg |
| Vehicle Length | 4570 mm | 4530 mm |
| Vehicle Width | 1860 mm | 1430 mm |
| Vehicle Height | 1680 mm | 1820 mm |
| Wheelbase Size | 2890 mm | 2770 mm |
| Fuel Tank Capacity | 67 L | 63 L |
