2005 Audi S8 vs. 1981 BMW 725
To start off, 2005 Audi S8 is newer by 24 year(s). Which means there will be less support and parts availability for 1981 BMW 725. In addition, the cost of maintenance, including insurance, on 1981 BMW 725 would be higher. At 4,172 cc (8 cylinders), 2005 Audi S8 is equipped with a bigger engine. In terms of performance, 2005 Audi S8 (247 HP @ 4000 RPM) has 99 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM). In normal driving conditions, 2005 Audi S8 should accelerate faster than 1981 BMW 725.
Because 2005 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 1981 BMW 725. In wet, icy, snow, or gravel driving conditions, 2005 Audi S8 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 S8 (450 Nm @ 3400 RPM) has 235 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 2005 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
| 2005 Audi S8 | 1981 BMW 725 | |
| Make | Audi | BMW |
| Model | S8 | 725 |
| Year Released | 2005 | 1981 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 2493 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 247 HP | 148 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 450 Nm | 215 Nm |
| Torque RPM | 3400 RPM | 4000 RPM |
| Drive Type | AWD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Wheelbase Size | 2290 mm | 2810 mm |
