2009 Audi A8 vs. 2008 Audi A5
To start off, 2009 Audi A8 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi A5. In addition, the cost of maintenance, including insurance, on 2008 Audi A5 would be higher. At 3,936 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (272 HP @ 3750 RPM) has 10 more horse power than 2008 Audi A5. (262 HP @ 6500 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2008 Audi A5. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 330 kg more than 2008 Audi A5. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Audi A5. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi A8 (650 Nm @ 1800 RPM) has 320 more torque (in Nm) than 2008 Audi A5. (330 Nm @ 3000 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A5.
Compare all specifications:
| 2009 Audi A8 | 2008 Audi A5 | |
| Make | Audi | Audi |
| Model | A8 | A5 |
| Year Released | 2009 | 2008 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 3197 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 272 HP | 262 HP |
| Engine RPM | 3750 RPM | 6500 RPM |
| Torque | 650 Nm | 330 Nm |
| Torque RPM | 1800 RPM | 3000 RPM |
| Engine Compression Ratio | 18.0:1 | 10.5:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.8 seconds | 6.1 seconds |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1940 kg | 1610 kg |
| Vehicle Length | 5190 mm | 4630 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1380 mm |
| Wheelbase Size | 3080 mm | 2760 mm |
| Fuel Consumption Overall | 9.6 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 90 L | 80 L |
