2009 Audi A4 vs. 2009 Audi A8
To start off, both 2009 Audi A4 and 2009 Audi A8 were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,772 cc (6 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (207 HP @ 5500 RPM) has 39 more horse power than 2009 Audi A4. (168 HP @ 6000 RPM) In normal driving conditions, 2009 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 90 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than 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 (280 Nm @ 3000 RPM) has 50 more torque (in Nm) than 2009 Audi A4. (230 Nm @ 3200 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2009 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2009 | 2009 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 2772 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 168 HP | 207 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 230 Nm | 280 Nm |
| Torque RPM | 3200 RPM | 3000 RPM |
| Engine Compression Ratio | 11.0:1 | 12.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 219 km/hour | 238 km/hour |
| Acceleration 0-100mph | 9.7 seconds | 8 seconds |
| Drive Type | Front | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1600 kg | 1690 kg |
| Vehicle Length | 4580 mm | 5070 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Consumption Overall | 9.8 L/100km | 8.3 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
