2005 Audi A4 vs. 2005 Audi A8
To start off, both 2005 Audi A4 and 2005 Audi A8 were released in the same year (2005). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,178 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (335 HP @ 4000 RPM) has 173 more horse power than 2005 Audi A4. (162 HP @ 4000 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 225 kg more than 2005 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi A8 (430 Nm) has 80 more torque (in Nm) than 2005 Audi A4. (350 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2005 | 2005 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2496 cc | 4178 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 162 HP | 335 HP |
| Engine RPM | 4000 RPM | 4000 RPM |
| Torque | 350 Nm | 430 Nm |
| Engine Bore Size | 78.3 mm | 85 mm |
| Engine Stroke Size | 86.4 mm | 93 mm |
| Engine Compression Ratio | 18.0:1 | 11.0:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1720 kg | 1945 kg |
| Vehicle Length | 4580 mm | 5060 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1450 mm |
| Wheelbase Size | 2770 mm | 2950 mm |
| Fuel Consumption Overall | 7.3 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
