2008 BMW X3 vs. 2007 BMW 550
To start off, 2008 BMW X3 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 BMW 550. In addition, the cost of maintenance, including insurance, on 2007 BMW 550 would be higher. At 4,797 cc, 2007 BMW 550 is equipped with a bigger engine. In terms of performance, 2007 BMW 550 (657 HP @ 3400 RPM) has 397 more horse power than 2008 BMW X3. (260 HP @ 6600 RPM) In normal driving conditions, 2007 BMW 550 should accelerate faster than 2008 BMW X3. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW X3 weights approximately 158 kg more than 2007 BMW 550.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 550 (490 Nm @ 3400 RPM) has 175 more torque (in Nm) than 2008 BMW X3. (315 Nm @ 2750 RPM). This means 2007 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW X3.
Compare all specifications:
| 2008 BMW X3 | 2007 BMW 550 | |
| Make | BMW | BMW |
| Model | X3 | 550 |
| Year Released | 2008 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 4797 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 260 HP | 657 HP |
| Engine RPM | 6600 RPM | 3400 RPM |
| Torque | 315 Nm | 490 Nm |
| Torque RPM | 2750 RPM | 3400 RPM |
| Engine Compression Ratio | 10.7:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 210 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.5 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1818 kg | 1660 kg |
| Vehicle Length | 4570 mm | 4850 mm |
| Vehicle Width | 1680 mm | 1470 mm |
| Vehicle Height | 1860 mm | 1850 mm |
| Wheelbase Size | 2800 mm | 2890 mm |
| Fuel Consumption Overall | 10.3 L/100km | 10.8 L/100km |
| Fuel Tank Capacity | 67 L | 70 L |
