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 2,983 cc (6 cylinders), 2004 Audi A6 is equipped with a bigger engine. In terms of performance, 2004 Audi A6 (220 HP @ 4000 RPM) has 72 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM). In normal driving conditions, 2004 Audi A6 should accelerate faster than 1981 BMW 725.
Because 1981 BMW 725 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1981 BMW 725. However, in wet, icy, snow, or gravel driving conditions, 2004 Audi A6, being front wheel drive (FWD), will offer much better control with better grip. 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 (300 Nm) has 85 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 | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2983 cc | 2493 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 220 HP | 148 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 300 Nm | 215 Nm |
| Engine Bore Size | 83 mm | 86 mm |
| Engine Stroke Size | 93 mm | 71.6 mm |
| Engine Compression Ratio | 10.5:1 | 9.6:1 |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4880 mm | 4870 mm |
| Vehicle Width | 1820 mm | 1810 mm |
| Vehicle Height | 1480 mm | 1440 mm |
| Wheelbase Size | 2660 mm | 2810 mm |
