2003 BMW M3 vs. 1975 BMW 320
To start off, 2003 BMW M3 is newer by 28 year(s). Which means there will be less support and parts availability for 1975 BMW 320. In addition, the cost of maintenance, including insurance, on 1975 BMW 320 would be higher. At 3,168 cc (6 cylinders), 2003 BMW M3 is equipped with a bigger engine. In terms of performance, 2003 BMW M3 (342 HP @ 7900 RPM) has 214 more horse power than 1975 BMW 320. (128 HP @ 6000 RPM). In normal driving conditions, 2003 BMW M3 should accelerate faster than 1975 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW M3 weights approximately 335 kg more than 1975 BMW 320. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2003 BMW M3 (350 Nm @ 4900 RPM) has 176 more torque (in Nm) than 1975 BMW 320. (174 Nm @ 4000 RPM). This means 2003 BMW M3 will have an easier job in driving up hills or pulling heavy equipment than 1975 BMW 320.
Compare all specifications:
| 2003 BMW M3 | 1975 BMW 320 | |
| Make | BMW | BMW |
| Model | M3 | 320 |
| Year Released | 2003 | 1975 |
| Engine Position | Front | Front |
| Engine Size | 3168 cc | 1991 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 342 HP | 128 HP |
| Engine RPM | 7900 RPM | 6000 RPM |
| Torque | 350 Nm | 174 Nm |
| Torque RPM | 4900 RPM | 4000 RPM |
| Engine Bore Size | 87 mm | 80 mm |
| Engine Stroke Size | 91 mm | 66 mm |
| Engine Compression Ratio | 11.5:1 | 9.8:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 259 km/hour | 195 km/hour |
| Acceleration 0-100mph | 4.9 seconds | 11.2 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1385 kg | 1050 kg |
| Vehicle Length | 4500 mm | 4330 mm |
| Vehicle Width | 1790 mm | 1650 mm |
| Vehicle Height | 1370 mm | 1390 mm |
| Wheelbase Size | 2730 mm | 2580 mm |
