2007 BMW X3 vs. 2009 BMW 523
To start off, 2009 BMW 523 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW X3. In addition, the cost of maintenance, including insurance, on 2007 BMW X3 would be higher. At 2,991 cc (6 cylinders), 2007 BMW X3 is equipped with a bigger engine. In terms of performance, 2007 BMW X3 (201 HP @ 4000 RPM) has 26 more horse power than 2009 BMW 523. (175 HP @ 5800 RPM). In normal driving conditions, 2007 BMW X3 should accelerate faster than 2009 BMW 523. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X3 weights approximately 425 kg more than 2009 BMW 523. 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 2009 BMW 523. 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 (410 Nm @ 1500 RPM) has 180 more torque (in Nm) than 2009 BMW 523. (230 Nm @ 3500 RPM). This means 2007 BMW X3 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 523.
Compare all specifications:
| 2007 BMW X3 | 2009 BMW 523 | |
| Make | BMW | BMW |
| Model | X3 | 523 |
| Year Released | 2007 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 2991 cc | 2497 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 201 HP | 175 HP |
| Engine RPM | 4000 RPM | 5800 RPM |
| Torque | 410 Nm | 230 Nm |
| Torque RPM | 1500 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 82 mm |
| Engine Stroke Size | 90 mm | 78.8 mm |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 210 km/hour | 230 km/hour |
| Acceleration 0-100mph | 7.9 seconds | 9.3 seconds |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1925 kg | 1500 kg |
| Vehicle Length | 4570 mm | 4850 mm |
| Vehicle Width | 1860 mm | 1470 mm |
| Vehicle Height | 1680 mm | 1850 mm |
| Wheelbase Size | 2800 mm | 2890 mm |
| Fuel Consumption Overall | 8.4 L/100km | 9.5 L/100km |
| Fuel Tank Capacity | 67 L | 70 L |
