2005 BMW 645 vs. 2006 Mercedes-Benz S
To start off, 2006 Mercedes-Benz S is newer by 1 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (326 HP @ 6100 RPM) has 85 more horse power than 2006 Mercedes-Benz S. (241 HP @ 5800 RPM). In normal driving conditions, 2005 BMW 645 should accelerate faster than 2006 Mercedes-Benz S.
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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 97 more torque (in Nm) than 2006 Mercedes-Benz S. (350 Nm @ 3000 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2006 Mercedes-Benz S.
Compare all specifications:
| 2005 BMW 645 | 2006 Mercedes-Benz S | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | S |
| Year Released | 2005 | 2006 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 3720 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 3 valves |
| Horse Power | 326 HP | 241 HP |
| Engine RPM | 6100 RPM | 5800 RPM |
| Torque | 447 Nm | 350 Nm |
| Torque RPM | 3600 RPM | 3000 RPM |
| Engine Bore Size | 92 mm | 97 mm |
| Engine Stroke Size | 83 mm | 84 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Length | 4830 mm | 5050 mm |
| Vehicle Width | 1860 mm | 1860 mm |
| Vehicle Height | 1380 mm | 1450 mm |
| Wheelbase Size | 2890 mm | 2970 mm |
| Fuel Consumption Highway | 10.2 L/100km | 9.4 L/100km |
| Fuel Consumption City | 15.7 L/100km | 13.8 L/100km |
| Fuel Consumption Overall | 12.8 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 70 L | 88 L |
