2009 Audi A8 vs. 1999 Audi A4
To start off, 2009 Audi A8 is newer by 10 year(s). Which means there will be less support and parts availability for 1999 Audi A4. In addition, the cost of maintenance, including insurance, on 1999 Audi A4 would be higher. At 2,965 cc (6 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 1999 Audi A4 (247 HP @ 4150 RPM) has 17 more horse power than 2009 Audi A8. (230 HP @ 4000 RPM) In normal driving conditions, 1999 Audi A4 should accelerate faster than 2009 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi A4 weights approximately 405 kg more than 2009 Audi A8. 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 1999 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 (450 Nm @ 1400 RPM) has 129 more torque (in Nm) than 1999 Audi A4. (321 Nm @ 1900 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi A4.
Compare all specifications:
| 2009 Audi A8 | 1999 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2009 | 1999 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2965 cc | 1896 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 230 HP | 247 HP |
| Engine RPM | 4000 RPM | 4150 RPM |
| Torque | 450 Nm | 321 Nm |
| Torque RPM | 1400 RPM | 1900 RPM |
| Engine Bore Size | 83 mm | 79.5 mm |
| Engine Stroke Size | 91.4 mm | 95.5 mm |
| Fuel Type | Diesel | Diesel |
| Top Speed | 243 km/hour | 190 km/hour |
| Acceleration 0-100mph | 7.9 seconds | 12.8 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 930 kg | 1335 kg |
| Vehicle Length | 5190 mm | 4480 mm |
| Vehicle Width | 1900 mm | 1740 mm |
| Vehicle Height | 1450 mm | 1420 mm |
| Wheelbase Size | 3080 mm | 2630 mm |
| Fuel Tank Capacity | 90 L | 62 L |
