2005 Audi A6 vs. 1991 BMW 518
To start off, 2005 Audi A6 is newer by 14 year(s). Which means there will be less support and parts availability for 1991 BMW 518. In addition, the cost of maintenance, including insurance, on 1991 BMW 518 would be higher. At 4,163 cc (8 cylinders), 2005 Audi A6 is equipped with a bigger engine. In terms of performance, 2005 Audi A6 (335 HP @ 4000 RPM) has 221 more horse power than 1991 BMW 518. (114 HP @ 5500 RPM). In normal driving conditions, 2005 Audi A6 should accelerate faster than 1991 BMW 518. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A6 weights approximately 720 kg more than 1991 BMW 518. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1991 BMW 518 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 1991 BMW 518. However, in wet, icy, snow, or gravel driving conditions, 2005 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, 2005 Audi A6 (420 Nm) has 255 more torque (in Nm) than 1991 BMW 518. (165 Nm). This means 2005 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 518.
Compare all specifications:
| 2005 Audi A6 | 1991 BMW 518 | |
| Make | Audi | BMW |
| Model | A6 | 518 |
| Year Released | 2005 | 1991 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 1766 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 335 HP | 114 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 420 Nm | 165 Nm |
| Engine Bore Size | 85 mm | 84 mm |
| Engine Stroke Size | 93 mm | 81 mm |
| Engine Compression Ratio | 11.0:1 | 8.8:1 |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1880 kg | 1160 kg |
| Vehicle Length | 4920 mm | 4730 mm |
| Vehicle Width | 2020 mm | 1760 mm |
| Vehicle Height | 1460 mm | 1420 mm |
| Wheelbase Size | 2660 mm | 2770 mm |
