2004 Audi A8 vs. 2003 Porsche 911
To start off, 2004 Audi A8 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 Porsche 911. In addition, the cost of maintenance, including insurance, on 2003 Porsche 911 would be higher. At 5,998 cc, 2004 Audi A8 is equipped with a bigger engine. In terms of performance, 2004 Audi A8 (450 HP @ 6300 RPM) has 7 more horse power than 2003 Porsche 911. (443 HP @ 6000 RPM). In normal driving conditions, 2004 Audi A8 should accelerate faster than 2003 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A8 weights approximately 291 kg more than 2003 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 Porsche 911 (620 Nm @ 2700 RPM) has 60 more torque (in Nm) than 2004 Audi A8. (560 Nm @ 4000 RPM). This means 2003 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A8. 2004 Audi A8 has automatic transmission and 2003 Porsche 911 has manual transmission. 2003 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Audi A8 | 2003 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 2004 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 5998 cc | 3600 cc |
| Engine Type | W | boxer |
| Horse Power | 450 HP | 443 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 560 Nm | 620 Nm |
| Torque RPM | 4000 RPM | 2700 RPM |
| Engine Bore Size | 84.1 mm | 100 mm |
| Engine Stroke Size | 90.2 mm | 76.4 mm |
| Engine Compression Ratio | 11.0:1 | 9.4:1 |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1995 kg | 1704 kg |
| Vehicle Length | 5060 mm | 4440 mm |
| Vehicle Width | 1900 mm | 1840 mm |
| Vehicle Height | 1450 mm | 1300 mm |
| Wheelbase Size | 2950 mm | 2360 mm |
