2007 BMW 320 vs. 2006 BMW 645
To start off, 2007 BMW 320 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 173 more horse power than 2007 BMW 320. (155 HP @ 4000 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2007 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 355 kg more than 2007 BMW 320. 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 120 more torque (in Nm) than 2007 BMW 320. (330 Nm @ 2000 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 320.
Compare all specifications:
| 2007 BMW 320 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | 320 | 645 |
| Year Released | 2007 | 2006 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 155 HP | 328 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 330 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 82.7 mm |
| Engine Compression Ratio | 17.0:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 220 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.6 seconds | 6.4 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1460 kg | 1815 kg |
| Vehicle Length | 4530 mm | 4830 mm |
| Vehicle Width | 1420 mm | 1860 mm |
| Vehicle Height | 1820 mm | 1380 mm |
| Wheelbase Size | 2770 mm | 2790 mm |
| Fuel Consumption Overall | 7.5 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
