2004 BMW 645 vs. 2011 BMW 520
To start off, 2011 BMW 520 is newer by 7 year(s). Which means there will be less support and parts availability for 2004 BMW 645. In addition, the cost of maintenance, including insurance, on 2004 BMW 645 would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (322 HP @ 7400 RPM) has 140 more horse power than 2011 BMW 520. (182 HP @ 4000 RPM). In normal driving conditions, 2004 BMW 645 should accelerate faster than 2011 BMW 520.
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, 2004 BMW 645 (447 Nm) has 67 more torque (in Nm) than 2011 BMW 520. (380 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2011 BMW 520.
Compare all specifications:
| 2004 BMW 645 | 2011 BMW 520 | |
| Make | BMW | BMW |
| Model | 645 | 520 |
| Year Released | 2004 | 2011 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 1995 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 322 HP | 182 HP |
| Engine RPM | 7400 RPM | 4000 RPM |
| Torque | 447 Nm | 380 Nm |
| Engine Bore Size | 92 mm | 90 mm |
| Engine Stroke Size | 83 mm | 84 mm |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Length | 4840 mm | 4907 mm |
| Vehicle Width | 1860 mm | 1860 mm |
| Vehicle Height | 1380 mm | 1462 mm |
| Wheelbase Size | 2790 mm | 2968 mm |
| Fuel Tank Capacity | 70 L | 70 L |
