2007 Mercedes-Benz Viano vs. 2006 BMW 645
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 @ 6100 RPM) has 141 more horse power than 2007 Mercedes-Benz Viano. (187 HP @ 5600 RPM) 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 393 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 180 more torque (in Nm) than 2007 Mercedes-Benz Viano. (270 Nm @ 2750 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:
| 2007 Mercedes-Benz Viano | 2006 BMW 645 | |
| Make | Mercedes-Benz | BMW |
| Model | Viano | 645 |
| Year Released | 2007 | 2006 |
| Body Type | Minivan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3199 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 3 valves | 4 valves |
| Horse Power | 187 HP | 328 HP |
| Engine RPM | 5600 RPM | 6100 RPM |
| Torque | 270 Nm | 450 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Bore Size | 89.9 mm | 92 mm |
| Engine Stroke Size | 84 mm | 82.7 mm |
| Engine Compression Ratio | 10.0:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 181 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.6 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2085 kg | 1692 kg |
| Vehicle Length | 5000 mm | 4830 mm |
| Vehicle Width | 1910 mm | 1860 mm |
| Vehicle Height | 1880 mm | 1380 mm |
| Wheelbase Size | 3210 mm | 2790 mm |
| Fuel Consumption Overall | 12.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 75 L | 70 L |
