2007 Audi A4 vs. 1981 BMW 745
To start off, 2007 Audi A4 is newer by 26 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, 2007 Audi A4 (255 HP @ 6500 RPM) has 3 more horse power than 1981 BMW 745. (252 HP @ 5200 RPM). In normal driving conditions, 2007 Audi A4 should accelerate faster than 1981 BMW 745. With that said, vehicle weight also plays an important factor in acceleration. 1981 BMW 745 weights approximately 318 kg more than 2007 Audi A4.
Because 2007 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 745. In wet, icy, snow, or gravel driving conditions, 2007 Audi A4 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, 1981 BMW 745 (380 Nm @ 2200 RPM) has 50 more torque (in Nm) than 2007 Audi A4. (330 Nm @ 3250 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A4.
Compare all specifications:
| 2007 Audi A4 | 1981 BMW 745 | |
| Make | Audi | BMW |
| Model | A4 | 745 |
| Year Released | 2007 | 1981 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3123 cc | 3430 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 255 HP | 252 HP |
| Engine RPM | 6500 RPM | 5200 RPM |
| Torque | 330 Nm | 380 Nm |
| Torque RPM | 3250 RPM | 2200 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 96 mm | 86 mm |
| Engine Compression Ratio | 11.3:1 | 8.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1278 kg | 1596 kg |
| Vehicle Length | 4590 mm | 4870 mm |
| Vehicle Width | 1780 mm | 1810 mm |
| Vehicle Height | 1430 mm | 1440 mm |
| Wheelbase Size | 2660 mm | 2770 mm |
| Fuel Tank Capacity | 63 L | 100 L |
