2008 BMW 645 vs. 2006 Mercedes-Benz R
To start off, 2008 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Mercedes-Benz R. In addition, the cost of maintenance, including insurance, on 2006 Mercedes-Benz R would be higher. At 4,966 cc (8 cylinders), 2006 Mercedes-Benz R is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 26 more horse power than 2006 Mercedes-Benz R. (302 HP @ 5600 RPM). In normal driving conditions, 2008 BMW 645 should accelerate faster than 2006 Mercedes-Benz R. With that said, vehicle weight also plays an important factor in acceleration. 2006 Mercedes-Benz R weights approximately 550 kg more than 2008 BMW 645.
Because 2006 Mercedes-Benz R is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 645. In wet, icy, snow, or gravel driving conditions, 2006 Mercedes-Benz R 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, 2006 Mercedes-Benz R (460 Nm @ 2700 RPM) has 10 more torque (in Nm) than 2008 BMW 645. (450 Nm @ 3600 RPM). This means 2006 Mercedes-Benz R will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 645. 2006 Mercedes-Benz R has automatic transmission and 2008 BMW 645 has manual transmission. 2008 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Mercedes-Benz R will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 BMW 645 | 2006 Mercedes-Benz R | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | R |
| Year Released | 2008 | 2006 |
| Body Type | Coupe | Minivan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4966 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 328 HP | 302 HP |
| Engine RPM | 6100 RPM | 5600 RPM |
| Torque | 450 Nm | 460 Nm |
| Torque RPM | 3600 RPM | 2700 RPM |
| Engine Bore Size | 92.1 mm | 97 mm |
| Engine Stroke Size | 82.7 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 5.6 seconds | 7 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 6 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1690 kg | 2240 kg |
| Vehicle Length | 4830 mm | 5160 mm |
| Vehicle Width | 1860 mm | 1930 mm |
| Vehicle Height | 1380 mm | 1660 mm |
| Wheelbase Size | 2790 mm | 3220 mm |
| Fuel Consumption Overall | 11.8 L/100km | 13.3 L/100km |
| Fuel Tank Capacity | 70 L | 80 L |
