2003 BMW 645 vs. 2003 BMW 545
To start off, both 2003 BMW 645 and 2003 BMW 545 were released in the same year (2003). Therefore the support and the availability on parts for both vehicles should be relatively similar. Both 2003 BMW 645 and 2003 BMW 545 are equipped with a 4,398 cc engine. In terms of performance, 2003 BMW 545 (328 HP @ 6100 RPM) has 7 more horse power than 2003 BMW 645. (321 HP @ 6100 RPM) In normal driving conditions, 2003 BMW 545 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 190 kg more than 2003 BMW 545.
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, both vehicles can yield 450 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles. 2003 BMW 645 has automatic transmission and 2003 BMW 545 has manual transmission. 2003 BMW 545 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 645 | 2003 BMW 545 | |
| Make | BMW | BMW |
| Model | 645 | 545 |
| Year Released | 2003 | 2003 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 321 HP | 328 HP |
| Engine RPM | 6100 RPM | 6100 RPM |
| Torque | 450 Nm | 450 Nm |
| Torque RPM | 3600 RPM | 3600 RPM |
| Engine Bore Size | 92 mm | 92 mm |
| Engine Stroke Size | 82.7 mm | 82.7 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.2 seconds | 6.1 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1895 kg | 1705 kg |
| Vehicle Length | 4830 mm | 4850 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2840 mm |
| Fuel Consumption Highway | 8.5 L/100km | 7.9 L/100km |
| Fuel Consumption City | 16.8 L/100km | 16.3 L/100km |
| Fuel Consumption Overall | 11.5 L/100km | 10.9 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
