2005 Audi A8 vs. 2003 Porsche 911
To start off, 2005 Audi A8 is newer by 2 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 4,163 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2003 Porsche 911 (443 HP @ 6000 RPM) has 108 more horse power than 2005 Audi A8. (335 HP @ 4000 RPM) In normal driving conditions, 2003 Porsche 911 should accelerate faster than 2005 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 335 kg more than 2003 Porsche 911.
Because 2003 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2005 Audi A8. In wet, icy, snow, or gravel driving conditions, 2003 Porsche 911 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 Porsche 911 (621 Nm) has 190 more torque (in Nm) than 2005 Audi A8. (431 Nm). This means 2003 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A8.
Compare all specifications:
| 2005 Audi A8 | 2003 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 2005 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 4163 cc | 3600 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Horse Power | 335 HP | 443 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 431 Nm | 621 Nm |
| Engine Bore Size | 85 mm | 100 mm |
| Engine Stroke Size | 93 mm | 76.4 mm |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1995 kg | 1660 kg |
| Vehicle Length | 5190 mm | 4440 mm |
| Vehicle Width | 1900 mm | 1840 mm |
| Vehicle Height | 1460 mm | 1300 mm |
| Wheelbase Size | 3080 mm | 2360 mm |
| Fuel Consumption Highway | 9.8 L/100km | 9.7 L/100km |
| Fuel Consumption City | 13.1 L/100km | 19.6 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 13.3 L/100km |
| Fuel Tank Capacity | 90 L | 64 L |
