1971 BMW 3 vs. 1991 BMW 730
To start off, 1991 BMW 730 is newer by 20 year(s). Which means there will be less support and parts availability for 1971 BMW 3. In addition, the cost of maintenance, including insurance, on 1971 BMW 3 would be higher. Both 1971 BMW 3 and 1991 BMW 730 are equipped with a 2,986 cc engine. In terms of performance, 1991 BMW 730 (185 HP @ 5800 RPM) has 15 more horse power than 1971 BMW 3. (170 HP @ 6000 RPM) In normal driving conditions, 1991 BMW 730 should accelerate faster than 1971 BMW 3. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW 730 weights approximately 220 kg more than 1971 BMW 3. 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, 1991 BMW 730 (260 Nm @ 4000 RPM) has 6 more torque (in Nm) than 1971 BMW 3. (254 Nm @ 3700 RPM). This means 1991 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 1971 BMW 3.
Compare all specifications:
| 1971 BMW 3 | 1991 BMW 730 | |
| Make | BMW | BMW |
| Model | 3 | 730 |
| Year Released | 1971 | 1991 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2986 cc | 2986 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 170 HP | 185 HP |
| Engine RPM | 6000 RPM | 5800 RPM |
| Torque | 254 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 | 9.1:1 | 9.0:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1380 kg | 1600 kg |
| Vehicle Length | 4720 mm | 4920 mm |
| Vehicle Width | 1760 mm | 1850 mm |
| Vehicle Height | 1460 mm | 1420 mm |
| Wheelbase Size | 2700 mm | 2840 mm |
