2009 Audi A4 vs. 1981 BMW 745
To start off, 2009 Audi A4 is newer by 28 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 3,430 cc (6 cylinders), 1981 BMW 745 is equipped with a bigger engine. In terms of performance, 1981 BMW 745 (252 HP @ 5200 RPM) has 94 more horse power than 2009 Audi A4. (158 HP @ 4500 RPM) In normal driving conditions, 1981 BMW 745 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 180 kg more than 2009 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1981 BMW 745 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 745. However, in wet, icy, snow, or gravel driving conditions, 2009 Audi A4, 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, 1981 BMW 745 (380 Nm @ 2200 RPM) has 129 more torque (in Nm) than 2009 Audi A4. (251 Nm @ 1500 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 1981 BMW 745 | |
| Make | Audi | BMW |
| Model | A4 | 745 |
| Year Released | 2009 | 1981 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1798 cc | 3430 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 158 HP | 252 HP |
| Engine RPM | 4500 RPM | 5200 RPM |
| Torque | 251 Nm | 380 Nm |
| Torque RPM | 1500 RPM | 2200 RPM |
| Engine Bore Size | 82.5 mm | 92 mm |
| Engine Stroke Size | 84.1 mm | 86 mm |
| Top Speed | 225 km/hour | 220 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1410 kg | 1590 kg |
| Vehicle Length | 4710 mm | 4870 mm |
| Vehicle Width | 1830 mm | 1810 mm |
| Vehicle Height | 1430 mm | 1440 mm |
| Wheelbase Size | 2810 mm | 2800 mm |
| Fuel Tank Capacity | 65 L | 100 L |
