2006 BMW 645 vs. 2007 BMW 318
To start off, 2007 BMW 318 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 200 more horse power than 2007 BMW 318. (128 HP @ 5750 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2007 BMW 318. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 401 kg more than 2007 BMW 318. 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 270 more torque (in Nm) than 2007 BMW 318. (180 Nm @ 3250 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 318. 2007 BMW 318 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 318 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 645 | 2007 BMW 318 | |
| Make | BMW | BMW |
| Model | 645 | 318 |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1995 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 328 HP | 128 HP |
| Engine RPM | 6100 RPM | 5750 RPM |
| Torque | 450 Nm | 180 Nm |
| Torque RPM | 3600 RPM | 3250 RPM |
| Engine Bore Size | 92 mm | 84 mm |
| Engine Stroke Size | 83 mm | 90 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 208 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 10 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 | 1435 kg |
| Vehicle Length | 4830 mm | 4230 mm |
| Vehicle Width | 1860 mm | 1820 mm |
| Vehicle Height | 1380 mm | 1430 mm |
| Wheelbase Size | 2790 mm | 2770 mm |
| Fuel Consumption Overall | 12.8 L/100km | 7.3 L/100km |
| Fuel Tank Capacity | 70 L | 63 L |
