2005 Audi A8 vs. 2008 Audi A4
To start off, 2008 Audi A4 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 4,134 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (322 HP @ 3750 RPM) has 194 more horse power than 2008 Audi A4. (128 HP @ 5700 RPM). In normal driving conditions, 2005 Audi A8 should accelerate faster than 2008 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 315 kg more than 2008 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Audi A4. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 Audi A8 (650 Nm @ 1600 RPM) has 454 more torque (in Nm) than 2008 Audi A4. (196 Nm @ 3500 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A4. 2005 Audi A8 has automatic transmission and 2008 Audi A4 has manual transmission. 2008 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Audi A8 | 2008 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2005 | 2008 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4134 cc | 1984 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 322 HP | 128 HP |
| Engine RPM | 3750 RPM | 5700 RPM |
| Torque | 650 Nm | 196 Nm |
| Torque RPM | 1600 RPM | 3500 RPM |
| Engine Bore Size | 83 mm | 82.5 mm |
| Engine Stroke Size | 95.5 mm | 92.8 mm |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 250 km/hour | 208 km/hour |
| Acceleration 0-100mph | 6.2 seconds | 10.9 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1945 kg | 1630 kg |
| Vehicle Length | 5070 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1400 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption Overall | 9.4 L/100km | 8.6 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
