2003 BMW 520 vs. 2007 BMW 650
To start off, 2007 BMW 650 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 BMW 520. In addition, the cost of maintenance, including insurance, on 2003 BMW 520 would be higher. At 4,797 cc (8 cylinders), 2007 BMW 650 is equipped with a bigger engine. In terms of performance, 2007 BMW 650 (362 HP @ 6300 RPM) has 195 more horse power than 2003 BMW 520. (167 HP @ 5800 RPM) In normal driving conditions, 2007 BMW 650 should accelerate faster than 2003 BMW 520. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW 650 weights approximately 80 kg more than 2003 BMW 520. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 650 (490 Nm @ 3400 RPM) has 280 more torque (in Nm) than 2003 BMW 520. (210 Nm @ 3500 RPM). This means 2007 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 520.
Compare all specifications:
| 2003 BMW 520 | 2007 BMW 650 | |
| Make | BMW | BMW |
| Model | 520 | 650 |
| Year Released | 2003 | 2007 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 4797 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 167 HP | 362 HP |
| Engine RPM | 5800 RPM | 6300 RPM |
| Torque | 210 Nm | 490 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Compression Ratio | 10.8:1 | 10.5:1 |
| Top Speed | 230 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.3 seconds | 5.4 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1560 kg | 1640 kg |
| Vehicle Length | 4850 mm | 4830 mm |
| Vehicle Width | 1850 mm | 1380 mm |
| Vehicle Height | 1470 mm | 1860 mm |
| Wheelbase Size | 3000 mm | 2790 mm |
| Fuel Tank Capacity | 70 L | 70 L |
