2009 Audi A8 vs. 2008 Audi A4
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 A4. In addition, the cost of maintenance, including insurance, on 2008 Audi A4 would be higher. At 4,163 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (350 HP @ 6800 RPM) has 98 more horse power than 2008 Audi A4. (252 HP @ 6500 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2008 Audi A4.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Audi A4. 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 (442 Nm @ 3500 RPM) has 112 more torque (in Nm) than 2008 Audi A4. (330 Nm @ 3250 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A4.
Compare all specifications:
| 2009 Audi A8 | 2008 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2009 | 2008 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 3123 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 350 HP | 252 HP |
| Engine RPM | 6800 RPM | 6500 RPM |
| Torque | 442 Nm | 330 Nm |
| Torque RPM | 3500 RPM | 3250 RPM |
| Engine Bore Size | 84.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Length | 5070 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2650 mm |
| Fuel Consumption Overall | 13.1 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
