2009 Audi A6 vs. 1991 BMW 518
To start off, 2009 Audi A6 is newer by 18 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 2,393 cc (6 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (168 HP @ 6000 RPM) has 54 more horse power than 1991 BMW 518. (114 HP @ 5500 RPM). In normal driving conditions, 2009 Audi A6 should accelerate faster than 1991 BMW 518. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A6 weights approximately 480 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 2009 Audi A6 is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW 518. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi A6 (230 Nm @ 3200 RPM) has 65 more torque (in Nm) than 1991 BMW 518. (165 Nm @ 4250 RPM). This means 2009 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 518.
Compare all specifications:
| 2009 Audi A6 | 1991 BMW 518 | |
| Make | Audi | BMW |
| Model | A6 | 518 |
| Year Released | 2009 | 1991 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 1766 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 168 HP | 114 HP |
| Engine RPM | 6000 RPM | 5500 RPM |
| Torque | 230 Nm | 165 Nm |
| Torque RPM | 3200 RPM | 4250 RPM |
| Engine Bore Size | 81 mm | 84 mm |
| Engine Stroke Size | 77.4 mm | 81 mm |
| Engine Compression Ratio | 11.0:1 | 8.8:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1640 kg | 1160 kg |
| Vehicle Length | 4800 mm | 4730 mm |
| Vehicle Width | 1820 mm | 1760 mm |
| Vehicle Height | 1460 mm | 1420 mm |
| Wheelbase Size | 2770 mm | 2770 mm |
