2008 BMW 525 vs. 2006 BMW 645
To start off, 2008 BMW 525 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 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 113 more horse power than 2008 BMW 525. (215 HP @ 6500 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2008 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 260 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.
Because 2008 BMW 525 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 645. In wet, icy, snow, or gravel driving conditions, 2008 BMW 525 will offer significantly more control. 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 200 more torque (in Nm) than 2008 BMW 525. (250 Nm @ 2750 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 525. 2006 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. 2006 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 BMW 525 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | 525 | 645 |
| Year Released | 2008 | 2006 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 215 HP | 328 HP |
| Engine RPM | 6500 RPM | 6100 RPM |
| Torque | 250 Nm | 450 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Acceleration 0-100mph | 8.5 seconds | 5.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1550 kg | 1810 kg |
| Vehicle Length | 4850 mm | 4830 mm |
| Vehicle Width | 1850 mm | 1860 mm |
| Vehicle Height | 1500 mm | 1380 mm |
| Wheelbase Size | 2840 mm | 2790 mm |
| Fuel Consumption Overall | 9.9 L/100km | 13.3 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
