2004 Audi A8 vs. 2005 Audi RS4
To start off, 2005 Audi RS4 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 Audi A8. In addition, the cost of maintenance, including insurance, on 2004 Audi A8 would be higher. At 3,697 cc (8 cylinders), 2004 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi RS4 (376 HP @ 6300 RPM) has 100 more horse power than 2004 Audi A8. (276 HP @ 6000 RPM) In normal driving conditions, 2005 Audi RS4 should accelerate faster than 2004 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A8 weights approximately 245 kg more than 2005 Audi RS4.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear 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, 2005 Audi RS4 (449 Nm @ 2500 RPM) has 89 more torque (in Nm) than 2004 Audi A8. (360 Nm @ 3750 RPM). This means 2005 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A8. 2004 Audi A8 has automatic transmission and 2005 Audi RS4 has manual transmission. 2005 Audi RS4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi A8 | 2005 Audi RS4 | |
| Make | Audi | Audi |
| Model | A8 | RS4 |
| Year Released | 2004 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3697 cc | 2671 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 5 valves |
| Horse Power | 276 HP | 376 HP |
| Engine RPM | 6000 RPM | 6300 RPM |
| Torque | 360 Nm | 449 Nm |
| Torque RPM | 3750 RPM | 2500 RPM |
| Engine Compression Ratio | 11.0:1 | 12.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1830 kg | 1585 kg |
| Vehicle Length | 5060 mm | 4600 mm |
| Vehicle Width | 1900 mm | 1820 mm |
| Vehicle Height | 1450 mm | 1420 mm |
| Wheelbase Size | 2850 mm | 2610 mm |
| Fuel Consumption Overall | 11.7 L/100km | 13.7 L/100km |
| Fuel Tank Capacity | 90 L | 55 L |
