2006 BMW 645 vs. 2007 BMW 325
To start off, 2007 BMW 325 is newer by 1 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 2007 BMW 325. (215 HP @ 6500 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2007 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 316 kg more than 2007 BMW 325. 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 199 more torque (in Nm) than 2007 BMW 325. (251 Nm @ 2750 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 325. 2007 BMW 325 has automatic transmission and 2006 BMW 645 has manual transmission. 2006 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW 325 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 645 | 2007 BMW 325 | |
| Make | BMW | BMW |
| Model | 645 | 325 |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2497 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 328 HP | 215 HP |
| Engine RPM | 6100 RPM | 6500 RPM |
| Torque | 450 Nm | 251 Nm |
| Torque RPM | 3600 RPM | 2750 RPM |
| Engine Bore Size | 92 mm | 78.8 mm |
| Engine Stroke Size | 83 mm | 82 mm |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 7.7 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1836 kg | 1520 kg |
| Vehicle Length | 4830 mm | 4530 mm |
| Vehicle Width | 1860 mm | 1430 mm |
| Vehicle Height | 1380 mm | 1820 mm |
| Wheelbase Size | 2790 mm | 2770 mm |
| Fuel Consumption Overall | 12.8 L/100km | 9 L/100km |
| Fuel Tank Capacity | 70 L | 63 L |
