2007 BMW X3 vs. 2008 BMW 523
To start off, 2008 BMW 523 is newer by 1 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 2,497 cc (6 cylinders), 2008 BMW 523 is equipped with a bigger engine. In terms of performance, 2008 BMW 523 (175 HP @ 5800 RPM) has 27 more horse power than 2007 BMW X3. (148 HP @ 4000 RPM) In normal driving conditions, 2008 BMW 523 should accelerate faster than 2007 BMW X3. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X3 weights approximately 250 kg more than 2008 BMW 523.
Because 2007 BMW X3 is four wheel drive (4WD), it will have significant more traction and grip than 2008 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 (330 Nm @ 2000 RPM) has 100 more torque (in Nm) than 2008 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 2008 BMW 523.
Compare all specifications:
| 2007 BMW X3 | 2008 BMW 523 | |
| Make | BMW | BMW |
| Model | X3 | 523 |
| Year Released | 2007 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 1994 cc | 2497 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 148 HP | 175 HP |
| Engine RPM | 4000 RPM | 5800 RPM |
| Torque | 330 Nm | 230 Nm |
| Torque RPM | 2000 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 |
| Acceleration 0-100mph | 9.1 seconds | 8.5 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1740 kg | 1490 kg |
| Vehicle Length | 4570 mm | 4870 mm |
| Vehicle Height | 1860 mm | 1470 mm |
| Wheelbase Size | 2800 mm | 2890 mm |
| Fuel Consumption Overall | 6.5 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 67 L | 70 L |
