2003 BMW 645 vs. 2008 BMW 525
To start off, 2008 BMW 525 is newer by 5 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (310 HP @ 6000 RPM) has 95 more horse power than 2008 BMW 525. (215 HP @ 6500 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2008 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 18 kg more than 2008 BMW 525. 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 200 more torque (in Nm) than 2008 BMW 525. (250 Nm @ 2750 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 525. 2003 BMW 645 has automatic transmission and 2008 BMW 525 has manual transmission. 2008 BMW 525 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 645 | 2008 BMW 525 | |
| Make | BMW | BMW |
| Model | 645 | 525 |
| Year Released | 2003 | 2008 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2497 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 310 HP | 215 HP |
| Engine RPM | 6000 RPM | 6500 RPM |
| Torque | 450 Nm | 250 Nm |
| Torque RPM | 3600 RPM | 2750 RPM |
| Engine Bore Size | 92 mm | 78.8 mm |
| Engine Stroke Size | 82.7 mm | 82 mm |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Top Speed | 250 km/hour | 240 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 7.8 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1698 kg | 1680 kg |
| Vehicle Length | 4830 mm | 4850 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1380 mm | 1500 mm |
| Wheelbase Size | 2790 mm | 2840 mm |
| Fuel Consumption Overall | 10.9 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
