2006 BMW 325 vs. 2007 BMW 645
To start off, 2007 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 325. In addition, the cost of maintenance, including insurance, on 2006 BMW 325 would be higher. At 4,398 cc (8 cylinders), 2007 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP @ 6100 RPM) has 113 more horse power than 2006 BMW 325. (215 HP @ 6250 RPM) In normal driving conditions, 2007 BMW 645 should accelerate faster than 2006 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 325 weights approximately 145 kg more than 2007 BMW 645.
Because 2006 BMW 325 is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 645. In wet, icy, snow, or gravel driving conditions, 2006 BMW 325 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, 2007 BMW 645 (450 Nm @ 3600 RPM) has 199 more torque (in Nm) than 2006 BMW 325. (251 Nm @ 2750 RPM). This means 2007 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 325. 2007 BMW 645 has automatic transmission and 2006 BMW 325 has manual transmission. 2006 BMW 325 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 325 | 2007 BMW 645 | |
| Make | BMW | BMW |
| Model | 325 | 645 |
| Year Released | 2006 | 2007 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3001 cc | 4398 cc |
| Horse Power | 215 HP | 328 HP |
| Engine RPM | 6250 RPM | 6100 RPM |
| Torque | 251 Nm | 450 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Compression Ratio | 10.7:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 209 km/hour | 245 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1835 kg | 1690 kg |
| Vehicle Length | 4530 mm | 4830 mm |
| Vehicle Width | 1820 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2770 mm | 2790 mm |
| Fuel Consumption Overall | 10.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 67 L | 70 L |
