2007 Audi A8 vs. 2009 Audi A5
To start off, 2009 Audi A5 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi A8. In addition, the cost of maintenance, including insurance, on 2007 Audi A8 would be higher. At 3,123 cc (6 cylinders), 2007 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi A8 (256 HP) has 19 more horse power than 2009 Audi A5. (237 HP). In normal driving conditions, 2007 Audi A8 should accelerate faster than 2009 Audi A5. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A8 weights approximately 270 kg more than 2009 Audi A5. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi A5 is four wheel drive (4WD), it will have significant more traction and grip than 2007 Audi A8. In wet, icy, snow, or gravel driving conditions, 2009 Audi A5 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, 2009 Audi A5 (500 Nm @ 1500 RPM) has 170 more torque (in Nm) than 2007 Audi A8. (330 Nm @ 3250 RPM). This means 2009 Audi A5 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A8.
Compare all specifications:
| 2007 Audi A8 | 2009 Audi A5 | |
| Make | Audi | Audi |
| Model | A8 | A5 |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3123 cc | 2965 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 256 HP | 237 HP |
| Torque | 330 Nm | 500 Nm |
| Torque RPM | 3250 RPM | 1500 RPM |
| Engine Bore Size | 84.5 mm | 83 mm |
| Engine Stroke Size | 92.8 mm | 91.4 mm |
| Engine Compression Ratio | 13.0:1 | 16.8:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8 seconds | 5.9 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1880 kg | 1610 kg |
| Vehicle Length | 5060 mm | 4630 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2950 mm | 2760 mm |
| Fuel Consumption Overall | 9.8 L/100km | 6.6 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
