2006 BMW 645 vs. 2008 Mercedes-Benz B
To start off, 2008 Mercedes-Benz B is newer by 2 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 234 more horse power than 2008 Mercedes-Benz B. (94 HP @ 5200 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2008 Mercedes-Benz B. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 508 kg more than 2008 Mercedes-Benz B. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2006 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2008 Mercedes-Benz B, being front wheel drive (FWD), will offer much better control with better grip. 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 310 more torque (in Nm) than 2008 Mercedes-Benz B. (140 Nm @ 3500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Mercedes-Benz B. 2006 BMW 645 has automatic transmission and 2008 Mercedes-Benz B has manual transmission. 2008 Mercedes-Benz B 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:
| 2006 BMW 645 | 2008 Mercedes-Benz B | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | B |
| Year Released | 2006 | 2008 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1498 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 328 HP | 94 HP |
| Engine RPM | 6100 RPM | 5200 RPM |
| Torque | 450 Nm | 140 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Engine Compression Ratio | 10.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 174 km/hour |
| Acceleration 0-100mph | 5.6 seconds | 13.2 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1810 kg | 1302 kg |
| Vehicle Length | 4830 mm | 4280 mm |
| Vehicle Width | 1860 mm | 1780 mm |
| Vehicle Height | 1380 mm | 1610 mm |
| Wheelbase Size | 2790 mm | 2780 mm |
| Fuel Consumption Overall | 13.3 L/100km | 6.6 L/100km |
| Fuel Tank Capacity | 70 L | 54 L |
