2006 BMW 645 vs. 2007 Mercedes-Benz Viano
To start off, 2007 Mercedes-Benz Viano 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) has 220 more horse power than 2007 Mercedes-Benz Viano. (108 HP). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2007 Mercedes-Benz Viano. With that said, vehicle weight also plays an important factor in acceleration. 2007 Mercedes-Benz Viano weights approximately 225 kg more than 2006 BMW 645.
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 179 more torque (in Nm) than 2007 Mercedes-Benz Viano. (271 Nm @ 1600 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Mercedes-Benz Viano.
Compare all specifications:
| 2006 BMW 645 | 2007 Mercedes-Benz Viano | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | Viano |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | Minivan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 2148 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 108 HP |
| Torque | 450 Nm | 271 Nm |
| Torque RPM | 3600 RPM | 1600 RPM |
| Engine Bore Size | 92 mm | 88 mm |
| Engine Stroke Size | 82.7 mm | 88.3 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 250 km/hour | 157 km/hour |
| Acceleration 0-100mph | 6.4 seconds | 16.2 seconds |
| Drive Type | Rear | Rear |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1815 kg | 2040 kg |
| Vehicle Length | 4830 mm | 5230 mm |
| Vehicle Width | 1860 mm | 1910 mm |
| Vehicle Height | 1380 mm | 1880 mm |
| Wheelbase Size | 2790 mm | 3210 mm |
| Fuel Consumption Overall | 12.8 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 70 L | 75 L |
