1981 BMW 725 vs. 1971 BMW 3
To start off, 1981 BMW 725 is newer by 10 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. At 2,986 cc (6 cylinders), 1971 BMW 3 is equipped with a bigger engine. In terms of performance, 1971 BMW 3 (170 HP @ 6000 RPM) has 22 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 1971 BMW 3 should accelerate faster than 1981 BMW 725.
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, 1971 BMW 3 (254 Nm @ 3700 RPM) has 39 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 1971 BMW 3 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
1981 BMW 725 | 1971 BMW 3 | |
Make | BMW | BMW |
Model | 725 | 3 |
Year Released | 1981 | 1971 |
Body Type | Sedan | Sedan |
Engine Position | Front | Front |
Engine Size | 2493 cc | 2986 cc |
Engine Cylinders | 6 cylinders | 6 cylinders |
Engine Type | in-line | in-line |
Horse Power | 148 HP | 170 HP |
Engine RPM | 5500 RPM | 6000 RPM |
Torque | 215 Nm | 254 Nm |
Torque RPM | 4000 RPM | 3700 RPM |
Engine Bore Size | 86 mm | 89 mm |
Engine Stroke Size | 71.6 mm | 80 mm |
Engine Compression Ratio | 9.6:1 | 9.1:1 |
Drive Type | Rear | Rear |
Number of Seats | 5 seats | 5 seats |
Number of Doors | 4 doors | 4 doors |
Vehicle Length | 4870 mm | 4720 mm |
Vehicle Width | 1810 mm | 1760 mm |
Vehicle Height | 1440 mm | 1460 mm |
Wheelbase Size | 2810 mm | 2700 mm |