2003 BMW 645 vs. 2013 Mercedes-Benz S
To start off, 2013 Mercedes-Benz S is newer by 10 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 5,500 cc (8 cylinders), 2013 Mercedes-Benz S is equipped with a bigger engine. In terms of performance, 2013 Mercedes-Benz S (529 HP @ 5500 RPM) has 204 more horse power than 2003 BMW 645. (325 HP @ 6100 RPM) In normal driving conditions, 2013 Mercedes-Benz S should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2013 Mercedes-Benz S weights approximately 480 kg more than 2003 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2013 Mercedes-Benz S (800 Nm @ 4300 RPM) has 350 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2013 Mercedes-Benz S will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2003 BMW 645 | 2013 Mercedes-Benz S | |
| Make | BMW | Mercedes-Benz |
| Model | 645 | S |
| Year Released | 2003 | 2013 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 5500 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 325 HP | 529 HP |
| Engine RPM | 6100 RPM | 5500 RPM |
| Torque | 450 Nm | 800 Nm |
| Torque RPM | 3600 RPM | 4300 RPM |
| Engine Bore Size | 92 mm | 98 mm |
| Engine Stroke Size | 82.7 mm | 90 mm |
| Engine Compression Ratio | 10.5:1 | 10.0 : 1 |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 4.5 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | CVT |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1690 kg | 2170 kg |
| Vehicle Length | 4830 mm | 5252 mm |
| Vehicle Width | 1860 mm | 2120 mm |
| Vehicle Height | 1380 mm | 1488 mm |
| Wheelbase Size | 2890 mm | 3165 mm |
| Fuel Consumption | 8.6 L/100km | 9.1 L/100km |
| Fuel Consumption City | 17.2 L/100km | 13.8 L/100km |
