1978 BMW 725 vs. 2005 BMW 730
To start off, 2005 BMW 730 is newer by 27 year(s). Which means there will be less support and parts availability for 1978 BMW 725. In addition, the cost of maintenance, including insurance, on 1978 BMW 725 would be higher. At 2,982 cc (6 cylinders), 2005 BMW 730 is equipped with a bigger engine. In terms of performance, 2005 BMW 730 (225 HP @ 6250 RPM) has 77 more horse power than 1978 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 2005 BMW 730 should accelerate faster than 1978 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, 2005 BMW 730 (300 Nm @ 3500 RPM) has 85 more torque (in Nm) than 1978 BMW 725. (215 Nm @ 4000 RPM). This means 2005 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 1978 BMW 725.
Compare all specifications:
| 1978 BMW 725 | 2005 BMW 730 | |
| Make | BMW | BMW |
| Model | 725 | 730 |
| Year Released | 1978 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2495 cc | 2982 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 148 HP | 225 HP |
| Engine RPM | 5500 RPM | 6250 RPM |
| Torque | 215 Nm | 300 Nm |
| Torque RPM | 4000 RPM | 3500 RPM |
| Engine Bore Size | 86.1 mm | 84 mm |
| Engine Stroke Size | 71.6 mm | 90 mm |
| Engine Compression Ratio | 9.6:1 | 10.2:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Length | 4870 mm | 5040 mm |
| Vehicle Width | 1810 mm | 1910 mm |
| Vehicle Height | 1440 mm | 1500 mm |
| Wheelbase Size | 2810 mm | 3000 mm |
