2006 BMW 525 vs. 1991 BMW 730
To start off, 2006 BMW 525 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 BMW 730. In addition, the cost of maintenance, including insurance, on 1991 BMW 730 would be higher. At 2,986 cc (6 cylinders), 1991 BMW 730 is equipped with a bigger engine. In terms of performance, 2006 BMW 525 (215 HP @ 6500 RPM) has 30 more horse power than 1991 BMW 730. (185 HP @ 5800 RPM). In normal driving conditions, 2006 BMW 525 should accelerate faster than 1991 BMW 730.
Because 2006 BMW 525 is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW 730. In wet, icy, snow, or gravel driving conditions, 2006 BMW 525 will offer significantly more control. 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 10 more torque (in Nm) than 2006 BMW 525. (250 Nm @ 2750 RPM). This means 1991 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 525.
Compare all specifications:
| 2006 BMW 525 | 1991 BMW 730 | |
| Make | BMW | BMW |
| Model | 525 | 730 |
| Year Released | 2006 | 1991 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2986 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 215 HP | 185 HP |
| Engine RPM | 6500 RPM | 5800 RPM |
| Torque | 250 Nm | 260 Nm |
| Torque RPM | 2750 RPM | 4000 RPM |
| Engine Bore Size | 78.9 mm | 89 mm |
| Engine Stroke Size | 82 mm | 80 mm |
| Engine Compression Ratio | 11.0:1 | 9.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Length | 4850 mm | 4920 mm |
| Vehicle Width | 1850 mm | 1850 mm |
| Vehicle Height | 1500 mm | 1420 mm |
| Wheelbase Size | 2840 mm | 2840 mm |
| Fuel Tank Capacity | 70 L | 90 L |
