2008 Audi A8 vs. 2009 Audi A4
To start off, 2009 Audi A4 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi A8. In addition, the cost of maintenance, including insurance, on 2008 Audi A8 would be higher. At 4,172 cc (8 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (330 HP @ 6500 RPM) has 143 more horse power than 2009 Audi A4. (187 HP @ 3500 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 240 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.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Audi A4. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Audi A8 (431 Nm @ 3500 RPM) has 31 more torque (in Nm) than 2009 Audi A4. (400 Nm @ 1400 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2008 Audi A8 has automatic transmission and 2009 Audi A4 has manual transmission. 2009 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi A8 | 2009 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2008 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 2698 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 330 HP | 187 HP |
| Engine RPM | 6500 RPM | 3500 RPM |
| Torque | 431 Nm | 400 Nm |
| Torque RPM | 3500 RPM | 1400 RPM |
| Engine Bore Size | 84.5 mm | 83.1 mm |
| Engine Stroke Size | 93 mm | 83.1 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Acceleration 0-100mph | 6.4 seconds | 7.9 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1910 kg | 1670 kg |
| Vehicle Length | 5190 mm | 4710 mm |
| Vehicle Width | 1900 mm | 1830 mm |
| Vehicle Height | 1460 mm | 1430 mm |
| Wheelbase Size | 3080 mm | 2810 mm |
| Fuel Consumption Overall | 11.9 L/100km | 6 L/100km |
| Fuel Tank Capacity | 90 L | 65 L |
