2004 Audi A6 vs. 1981 BMW 725
To start off, 2004 Audi A6 is newer by 23 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 4,179 cc (8 cylinders), 2004 Audi A6 is equipped with a bigger engine. In terms of performance, 2004 Audi A6 (300 HP) has 152 more horse power than 1981 BMW 725. (148 HP). In normal driving conditions, 2004 Audi A6 should accelerate faster than 1981 BMW 725.
Because 2004 Audi A6 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 725. In wet, icy, snow, or gravel driving conditions, 2004 Audi A6 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, 2004 Audi A6 (401 Nm) has 186 more torque (in Nm) than 1981 BMW 725. (215 Nm). This means 2004 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
| 2004 Audi A6 | 1981 BMW 725 | |
| Make | Audi | BMW |
| Model | A6 | 725 |
| Year Released | 2004 | 1981 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4179 cc | 2493 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 300 HP | 148 HP |
| Torque | 401 Nm | 215 Nm |
| Engine Bore Size | 84 mm | 86 mm |
| Engine Stroke Size | 93 mm | 71.6 mm |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4920 mm | 4870 mm |
| Vehicle Width | 1940 mm | 1810 mm |
| Vehicle Height | 1450 mm | 1440 mm |
| Wheelbase Size | 2660 mm | 2810 mm |
