2009 Audi A8 vs. 2007 Audi A4
To start off, 2009 Audi A8 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi A4. In addition, the cost of maintenance, including insurance, on 2007 Audi A4 would be higher. At 5,998 cc, 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (444 HP @ 6200 RPM) has 243 more horse power than 2007 Audi A4. (201 HP @ 4500 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2007 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 290 kg more than 2007 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 (580 Nm @ 4000 RPM) has 130 more torque (in Nm) than 2007 Audi A4. (450 Nm @ 1400 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A4.
Compare all specifications:
| 2009 Audi A8 | 2007 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2009 | 2007 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 5998 cc | 2967 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 201 HP |
| Engine RPM | 6200 RPM | 4500 RPM |
| Torque | 580 Nm | 450 Nm |
| Torque RPM | 4000 RPM | 1400 RPM |
| Engine Compression Ratio | 11.0:1 | 17.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 245 km/hour | 226 km/hour |
| Acceleration 0-100mph | 5.1 seconds | 7.9 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1995 kg | 1705 kg |
| Vehicle Length | 5070 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 3080 mm | 2650 mm |
| Fuel Consumption Overall | 13.8 L/100km | 8.3 L/100km |
| Fuel Tank Capacity | 90 L | 66 L |
