2004 Audi RS6 vs. 2005 BMW 630
To start off, 2005 BMW 630 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Audi RS6. In addition, the cost of maintenance, including insurance, on 2004 Audi RS6 would be higher. At 4,163 cc (8 cylinders), 2004 Audi RS6 is equipped with a bigger engine. In terms of performance, 2004 Audi RS6 (445 HP @ 6300 RPM) has 191 more horse power than 2005 BMW 630. (254 HP @ 6600 RPM). In normal driving conditions, 2004 Audi RS6 should accelerate faster than 2005 BMW 630. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi RS6 weights approximately 76 kg more than 2005 BMW 630. 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 2005 BMW 630. 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 260 more torque (in Nm) than 2005 BMW 630. (300 Nm @ 2500 RPM). This means 2004 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 630.
Compare all specifications:
| 2004 Audi RS6 | 2005 BMW 630 | |
| Make | Audi | BMW |
| Model | RS6 | 630 |
| Year Released | 2004 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2999 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 445 HP | 254 HP |
| Engine RPM | 6300 RPM | 6600 RPM |
| Torque | 560 Nm | 300 Nm |
| Torque RPM | 1950 RPM | 2500 RPM |
| Engine Bore Size | 84.5 mm | 85 mm |
| Engine Stroke Size | 93 mm | 88 mm |
| Engine Compression Ratio | 9.0:1 | 10.7:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1840 kg | 1764 kg |
| Vehicle Length | 4800 mm | 4830 mm |
| Vehicle Width | 1820 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1380 mm |
| Wheelbase Size | 2760 mm | 2670 mm |
| Fuel Tank Capacity | 70 L | 70 L |
