2004 Audi RS6 vs. 2003 BMW 545
To start off, 2004 Audi RS6 is newer by 1 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, 2004 Audi RS6 (445 HP @ 6300 RPM) has 117 more horse power than 2003 BMW 545. (328 HP @ 6100 RPM). In normal driving conditions, 2004 Audi RS6 should accelerate faster than 2003 BMW 545. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi RS6 weights approximately 135 kg more than 2003 BMW 545. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 545. In wet, icy, snow, or gravel driving conditions, 2004 Audi RS6 will offer significantly more control. 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, 2004 Audi RS6 (560 Nm @ 1950 RPM) has 110 more torque (in Nm) than 2003 BMW 545. (450 Nm @ 3600 RPM). This means 2004 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 545.
Compare all specifications:
| 2004 Audi RS6 | 2003 BMW 545 | |
| Make | Audi | BMW |
| Model | RS6 | 545 |
| Year Released | 2004 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 445 HP | 328 HP |
| Engine RPM | 6300 RPM | 6100 RPM |
| Torque | 560 Nm | 450 Nm |
| Torque RPM | 1950 RPM | 3600 RPM |
| Engine Bore Size | 84.5 mm | 92 mm |
| Engine Stroke Size | 93 mm | 82.7 mm |
| Engine Compression Ratio | 9.0:1 | 10.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1840 kg | 1705 kg |
| Vehicle Length | 4800 mm | 4850 mm |
| Vehicle Width | 1820 mm | 1850 mm |
| Vehicle Height | 1460 mm | 1470 mm |
| Wheelbase Size | 2760 mm | 2840 mm |
| Fuel Tank Capacity | 70 L | 70 L |
