2006 BMW 523 vs. 2003 BMW 545
To start off, 2006 BMW 523 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 BMW 545. In addition, the cost of maintenance, including insurance, on 2003 BMW 545 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 545 is equipped with a bigger engine. In terms of performance, 2003 BMW 545 (328 HP @ 6100 RPM) has 153 more horse power than 2006 BMW 523. (175 HP @ 5800 RPM) In normal driving conditions, 2003 BMW 545 should accelerate faster than 2006 BMW 523. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 523 weights approximately 130 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, 2003 BMW 545 (450 Nm @ 3600 RPM) has 220 more torque (in Nm) than 2006 BMW 523. (230 Nm @ 3500 RPM). This means 2003 BMW 545 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 523.
Compare all specifications:
| 2006 BMW 523 | 2003 BMW 545 | |
| Make | BMW | BMW |
| Model | 523 | 545 |
| Year Released | 2006 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 4398 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 328 HP |
| Engine RPM | 5800 RPM | 6100 RPM |
| Torque | 230 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Bore Size | 78.8 mm | 92 mm |
| Engine Stroke Size | 82 mm | 82.7 mm |
| Engine Compression Ratio | 11.0:1 | 10.0:1 |
| Top Speed | 230 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9 seconds | 6.1 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1835 kg | 1705 kg |
| Vehicle Length | 4850 mm | 4850 mm |
| Vehicle Width | 1850 mm | 1850 mm |
| Vehicle Height | 1470 mm | 1470 mm |
| Wheelbase Size | 2890 mm | 2840 mm |
| Fuel Consumption Overall | 10.6 L/100km | 10.9 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
