2007 BMW M6 vs. 2003 BMW 520
To start off, 2007 BMW M6 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 4,997 cc (10 cylinders), 2007 BMW M6 is equipped with a bigger engine. In terms of performance, 2007 BMW M6 (500 HP @ 7750 RPM) has 333 more horse power than 2003 BMW 520. (167 HP @ 5800 RPM). In normal driving conditions, 2007 BMW M6 should accelerate faster than 2003 BMW 520. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW M6 weights approximately 445 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 M6 (520 Nm @ 6100 RPM) has 310 more torque (in Nm) than 2003 BMW 520. (210 Nm @ 3500 RPM). This means 2007 BMW M6 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 520.
Compare all specifications:
| 2007 BMW M6 | 2003 BMW 520 | |
| Make | BMW | BMW |
| Model | M6 | 520 |
| Year Released | 2007 | 2003 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4997 cc | 2171 cc |
| Engine Cylinders | 10 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 500 HP | 167 HP |
| Engine RPM | 7750 RPM | 5800 RPM |
| Torque | 520 Nm | 210 Nm |
| Torque RPM | 6100 RPM | 3500 RPM |
| Engine Bore Size | 92 mm | 80 mm |
| Engine Stroke Size | 75.2 mm | 72 mm |
| Engine Compression Ratio | 12.0:1 | 10.8:1 |
| Top Speed | 205 km/hour | 230 km/hour |
| Acceleration 0-100mph | 4.8 seconds | 9.3 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 2005 kg | 1560 kg |
| Vehicle Length | 4880 mm | 4850 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 3000 mm |
| Fuel Consumption Overall | 15.2 L/100km | 9 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
