2009 Audi A4 vs. 2004 Audi A8
To start off, 2009 Audi A4 is newer by 5 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 3,935 cc (8 cylinders), 2004 Audi A8 is equipped with a bigger engine. In terms of performance, 2004 Audi A8 (271 HP @ 3750 RPM) has 84 more horse power than 2009 Audi A4. (187 HP @ 3500 RPM) In normal driving conditions, 2004 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A8 weights approximately 295 kg more than 2009 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2004 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Audi A4. In wet, icy, snow, or gravel driving conditions, 2004 Audi A8 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 A8 (650 Nm @ 1800 RPM) has 250 more torque (in Nm) than 2009 Audi A4. (400 Nm @ 1400 RPM). This means 2004 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2004 Audi A8 has automatic transmission and 2009 Audi A4 has manual transmission. 2009 Audi A4 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:
| 2009 Audi A4 | 2004 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2009 | 2004 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2697 cc | 3935 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 187 HP | 271 HP |
| Engine RPM | 3500 RPM | 3750 RPM |
| Torque | 400 Nm | 650 Nm |
| Torque RPM | 1400 RPM | 1800 RPM |
| Engine Bore Size | 82.6 mm | 81 mm |
| Engine Stroke Size | 84.1 mm | 95.5 mm |
| Engine Compression Ratio | 17.5:1 | 18.0:1 |
| Fuel Type | Diesel | Diesel |
| Acceleration 0-100mph | 8.3 seconds | 6.7 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1645 kg | 1940 kg |
| Vehicle Length | 4710 mm | 5060 mm |
| Vehicle Width | 1830 mm | 1900 mm |
| Vehicle Height | 1440 mm | 1450 mm |
| Wheelbase Size | 2810 mm | 2950 mm |
| Fuel Consumption Overall | 6.5 L/100km | 9.7 L/100km |
| Fuel Tank Capacity | 65 L | 90 L |
