2005 Audi A8 vs. 1981 Porsche 911
To start off, 2005 Audi A8 is newer by 24 year(s). Which means there will be less support and parts availability for 1981 Porsche 911. In addition, the cost of maintenance, including insurance, on 1981 Porsche 911 would be higher. At 4,134 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (322 HP @ 3750 RPM) has 90 more horse power than 1981 Porsche 911. (232 HP @ 5900 RPM). In normal driving conditions, 2005 Audi A8 should accelerate faster than 1981 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 685 kg more than 1981 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 1981 Porsche 911. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 Audi A8 (650 Nm @ 1600 RPM) has 366 more torque (in Nm) than 1981 Porsche 911. (284 Nm @ 4800 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 1981 Porsche 911. 2005 Audi A8 has automatic transmission and 1981 Porsche 911 has manual transmission. 1981 Porsche 911 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 Audi A8 | 1981 Porsche 911 | |
| Make | Audi | Porsche |
| Model | A8 | 911 |
| Year Released | 2005 | 1981 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 4134 cc | 3164 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 322 HP | 232 HP |
| Engine RPM | 3750 RPM | 5900 RPM |
| Torque | 650 Nm | 284 Nm |
| Torque RPM | 1600 RPM | 4800 RPM |
| Engine Bore Size | 83 mm | 95 mm |
| Engine Stroke Size | 95.5 mm | 74.4 mm |
| Engine Compression Ratio | 16.5:1 | 10.3:1 |
| Top Speed | 250 km/hour | 246 km/hour |
| Acceleration 0-100mph | 6.2 seconds | 6.3 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1945 kg | 1260 kg |
| Vehicle Length | 5070 mm | 4300 mm |
| Vehicle Width | 1900 mm | 1660 mm |
| Vehicle Height | 1450 mm | 1330 mm |
| Wheelbase Size | 2950 mm | 2270 mm |
| Fuel Tank Capacity | 90 L | 80 L |
