2000 BMW 520 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 6 year(s). Which means there will be less support and parts availability for 2000 BMW 520. In addition, the cost of maintenance, including insurance, on 2000 BMW 520 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 160 more horse power than 2000 BMW 520. (168 HP @ 6100 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2000 BMW 520. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 140 kg more than 2000 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 240 more torque (in Nm) than 2000 BMW 520. (210 Nm @ 3500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2000 BMW 520. 2006 BMW 645 has automatic transmission and 2000 BMW 520 has manual transmission. 2000 BMW 520 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2000 BMW 520 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | 520 | 645 |
| Year Released | 2000 | 2006 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 168 HP | 328 HP |
| Engine RPM | 6100 RPM | 6100 RPM |
| Torque | 210 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1670 kg | 1810 kg |
| Vehicle Length | 4810 mm | 4830 mm |
| Vehicle Width | 1810 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2840 mm | 2790 mm |
| Fuel Tank Capacity | 70 L | 70 L |
