2004 Audi A4 vs. 2009 Audi A8
To start off, 2009 Audi A8 is newer by 5 year(s). Which means there will be less support and parts availability for 2004 Audi A4. In addition, the cost of maintenance, including insurance, on 2004 Audi A4 would be higher. At 3,696 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (276 HP @ 6000 RPM) has 148 more horse power than 2004 Audi A4. (128 HP @ 4000 RPM) In normal driving conditions, 2009 Audi A8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 285 kg more than 2004 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2009 Audi A8 (360 Nm @ 3750 RPM) has 40 more torque (in Nm) than 2004 Audi A4. (320 Nm @ 1900 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4. 2009 Audi A8 has automatic transmission and 2004 Audi A4 has manual transmission. 2004 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi A4 | 2009 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2004 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1896 cc | 3696 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 5 valves |
| Horse Power | 128 HP | 276 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 320 Nm | 360 Nm |
| Torque RPM | 1900 RPM | 3750 RPM |
| Engine Bore Size | 79.5 mm | 84.5 mm |
| Engine Stroke Size | 95.5 mm | 82.4 mm |
| Engine Compression Ratio | 19.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 205 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.1 seconds | 7.3 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1485 kg | 1770 kg |
| Vehicle Length | 4550 mm | 5060 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Consumption Overall | 6.4 L/100km | 11.7 L/100km |
| Fuel Tank Capacity | 66 L | 90 L |
