2007 Audi A4 vs. 2009 Audi A8
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 2,967 cc, 2007 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (229 HP @ 4000 RPM) has 28 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 125 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, both vehicles can yield 450 Nm of torque. So under normal driving conditions, the ability to climb up hills and pull heavy equipment should be relatively similar for both vehicles.
Compare all specifications:
| 2007 Audi A4 | 2009 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2007 | 2009 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 2966 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 201 HP | 229 HP |
| Engine RPM | 4500 RPM | 4000 RPM |
| Torque | 450 Nm | 450 Nm |
| Torque RPM | 1400 RPM | 1400 RPM |
| Engine Compression Ratio | 17.0:1 | 17.0:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 226 km/hour | 243 km/hour |
| Acceleration 0-100mph | 7.9 seconds | 7.8 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1705 kg | 1830 kg |
| Vehicle Height | 1430 mm | 1900 mm |
| Wheelbase Size | 2650 mm | 2950 mm |
| Fuel Consumption Overall | 8.3 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 66 L | 90 L |
