2001 BMW 320 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 5 year(s). Which means there will be less support and parts availability for 2001 BMW 320. In addition, the cost of maintenance, including insurance, on 2001 BMW 320 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 158 more horse power than 2001 BMW 320. (170 HP @ 5900 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2001 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 159 kg more than 2001 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 240 more torque (in Nm) than 2001 BMW 320. (210 Nm @ 3500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2001 BMW 320. 2006 BMW 645 has automatic transmission and 2001 BMW 320 has manual transmission. 2001 BMW 320 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:
| 2001 BMW 320 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | 320 | 645 |
| Year Released | 2001 | 2006 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 170 HP | 328 HP |
| Engine RPM | 5900 RPM | 6100 RPM |
| Torque | 210 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 80 mm | 92 mm |
| Engine Stroke Size | 72 mm | 82.7 mm |
| Engine Compression Ratio | 10.8:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 222 km/hour | 250 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1656 kg | 1815 kg |
| Vehicle Length | 4490 mm | 4830 mm |
| Vehicle Width | 1760 mm | 1860 mm |
| Vehicle Height | 1380 mm | 1380 mm |
| Wheelbase Size | 3000 mm | 2790 mm |
| Fuel Consumption Overall | 9.4 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
