2009 Audi A4 vs. 1975 BMW 315
To start off, 2009 Audi A4 is newer by 34 year(s). Which means there will be less support and parts availability for 1975 BMW 315. In addition, the cost of maintenance, including insurance, on 1975 BMW 315 would be higher. At 1,797 cc (4 cylinders), 2009 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (158 HP @ 4500 RPM) has 83 more horse power than 1975 BMW 315. (75 HP @ 5800 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 1975 BMW 315. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 460 kg more than 1975 BMW 315. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1975 BMW 315 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 1975 BMW 315. 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, 2009 Audi A4 (250 Nm @ 1500 RPM) has 140 more torque (in Nm) than 1975 BMW 315. (110 Nm @ 3200 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1975 BMW 315.
Compare all specifications:
| 2009 Audi A4 | 1975 BMW 315 | |
| Make | Audi | BMW |
| Model | A4 | 315 |
| Year Released | 2009 | 1975 |
| Body Type | Station Wagon | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1797 cc | 1574 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 158 HP | 75 HP |
| Engine RPM | 4500 RPM | 5800 RPM |
| Torque | 250 Nm | 110 Nm |
| Torque RPM | 1500 RPM | 3200 RPM |
| Engine Bore Size | 82.5 mm | 84 mm |
| Engine Stroke Size | 84.1 mm | 71 mm |
| Engine Compression Ratio | 9.6:1 | 9.5:1 |
| Top Speed | 218 km/hour | 154 km/hour |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1470 kg | 1010 kg |
| Vehicle Length | 4710 mm | 4360 mm |
| Vehicle Width | 1830 mm | 1620 mm |
| Vehicle Height | 1440 mm | 1390 mm |
| Wheelbase Size | 2810 mm | 2510 mm |
