1999 Audi A8 vs. 2011 Porsche 911
To start off, 2011 Porsche 911 is newer by 12 year(s). Which means there will be less support and parts availability for 1999 Audi A8. In addition, the cost of maintenance, including insurance, on 1999 Audi A8 would be higher. At 4,000 cc (6 cylinders), 2011 Porsche 911 is equipped with a bigger engine. In terms of performance, 2011 Porsche 911 (500 HP @ 8250 RPM) has 310 more horse power than 1999 Audi A8. (190 HP @ 6000 RPM) In normal driving conditions, 2011 Porsche 911 should accelerate faster than 1999 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi A8 weights approximately 275 kg more than 2011 Porsche 911.
Because 1999 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2011 Porsche 911. In wet, icy, snow, or gravel driving conditions, 1999 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, 2011 Porsche 911 (459 Nm @ 5750 RPM) has 179 more torque (in Nm) than 1999 Audi A8. (280 Nm @ 3200 RPM). This means 2011 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi A8. 1999 Audi A8 has automatic transmission and 2011 Porsche 911 has manual transmission. 2011 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1999 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1999 Audi A8 | 2011 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 1999 | 2011 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2771 cc | 4000 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 190 HP | 500 HP |
| Engine RPM | 6000 RPM | 8250 RPM |
| Torque | 280 Nm | 459 Nm |
| Torque RPM | 3200 RPM | 5750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1635 kg | 1360 kg |
| Vehicle Length | 5040 mm | 4491 mm |
| Vehicle Width | 1890 mm | 1852 mm |
| Vehicle Height | 1440 mm | 1280 mm |
| Wheelbase Size | 2890 mm | 2355 mm |
