2005 Audi A6 vs. 2003 Audi A8
To start off, 2005 Audi A6 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 Audi A8. In addition, the cost of maintenance, including insurance, on 2003 Audi A8 would be higher. At 4,172 cc (8 cylinders), 2005 Audi A6 is equipped with a bigger engine. In terms of performance, 2005 Audi A6 (296 HP @ 6200 RPM) has 24 more horse power than 2003 Audi A8. (272 HP @ 3750 RPM). In normal driving conditions, 2005 Audi A6 should accelerate faster than 2003 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi A8 weights approximately 5 kg more than 2005 Audi A6.
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, 2003 Audi A8 (650 Nm @ 1800 RPM) has 240 more torque (in Nm) than 2005 Audi A6. (410 Nm @ 3000 RPM). This means 2003 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A6.
Compare all specifications:
| 2005 Audi A6 | 2003 Audi A8 | |
| Make | Audi | Audi |
| Model | A6 | A8 |
| Year Released | 2005 | 2003 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 3936 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 296 HP | 272 HP |
| Engine RPM | 6200 RPM | 3750 RPM |
| Torque | 410 Nm | 650 Nm |
| Torque RPM | 3000 RPM | 1800 RPM |
| Engine Bore Size | 84.5 mm | 81 mm |
| Engine Stroke Size | 93 mm | 95.5 mm |
| Engine Compression Ratio | 11.0:1 | 17.5:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.1 seconds | 6.8 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1815 kg | 1820 kg |
| Vehicle Length | 4840 mm | 5190 mm |
| Vehicle Width | 1860 mm | 1900 mm |
| Vehicle Height | 1460 mm | 1460 mm |
| Wheelbase Size | 2470 mm | 3080 mm |
| Fuel Consumption Overall | 13.1 L/100km | 9.6 L/100km |
| Fuel Tank Capacity | 82 L | 90 L |
