2003 Audi A8 vs. 2009 Audi A4
To start off, 2009 Audi A4 is newer by 6 year(s). Which means there will be less support and parts availability for 2003 Audi A8. In addition, the cost of maintenance, including insurance, on 2003 Audi A8 would be higher. At 3,936 cc (8 cylinders), 2003 Audi A8 is equipped with a bigger engine. In terms of performance, 2003 Audi A8 (276 HP @ 3750 RPM) has 76 more horse power than 2009 Audi A4. (200 HP @ 5100 RPM). In normal driving conditions, 2003 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Audi A8 weights approximately 850 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 2003 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, 2003 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, 2003 Audi A8 (650 Nm @ 1800 RPM) has 369 more torque (in Nm) than 2009 Audi A4. (281 Nm @ 1800 RPM). This means 2003 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2003 Audi A8 | 2009 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2003 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 1984 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 276 HP | 200 HP |
| Engine RPM | 3750 RPM | 5100 RPM |
| Torque | 650 Nm | 281 Nm |
| Torque RPM | 1800 RPM | 1800 RPM |
| Engine Bore Size | 81.1 mm | 82.5 mm |
| Engine Stroke Size | 95.5 mm | 92.8 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1880 kg | 1030 kg |
| Vehicle Length | 5060 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1400 mm |
| Wheelbase Size | 2770 mm | 2660 mm |
| Fuel Consumption | 7.5 L/100km | 7.8 L/100km |
| Fuel Consumption City | 13.4 L/100km | 10.2 L/100km |
| Fuel Consumption Overall | 9.6 L/100km | 9.4 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
