1975 BMW 320 vs. 1990 BMW 730
To start off, 1990 BMW 730 is newer by 15 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 2,986 cc (6 cylinders), 1990 BMW 730 is equipped with a bigger engine. In terms of performance, 1990 BMW 730 (181 HP @ 5800 RPM) has 72 more horse power than 1975 BMW 320. (109 HP @ 5800 RPM) In normal driving conditions, 1990 BMW 730 should accelerate faster than 1975 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 1990 BMW 730 weights approximately 480 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, 1990 BMW 730 (260 Nm @ 4000 RPM) has 103 more torque (in Nm) than 1975 BMW 320. (157 Nm @ 3700 RPM). This means 1990 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 1975 BMW 320.
Compare all specifications:
| 1975 BMW 320 | 1990 BMW 730 | |
| Make | BMW | BMW |
| Model | 320 | 730 |
| Year Released | 1975 | 1990 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1990 cc | 2986 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 109 HP | 181 HP |
| Engine RPM | 5800 RPM | 5800 RPM |
| Torque | 157 Nm | 260 Nm |
| Torque RPM | 3700 RPM | 4000 RPM |
| Engine Bore Size | 89 mm | 89 mm |
| Engine Stroke Size | 80 mm | 80 mm |
| Engine Compression Ratio | 8.1:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1120 kg | 1600 kg |
| Vehicle Length | 4360 mm | 4920 mm |
| Vehicle Width | 1620 mm | 1850 mm |
| Vehicle Height | 1350 mm | 1420 mm |
| Wheelbase Size | 2580 mm | 2840 mm |
| Fuel Tank Capacity | 52 L | 90 L |
