2006 BMW MM Roadster vs. 1991 BMW 525
To start off, 2006 BMW MM Roadster is newer by 15 year(s). Which means there will be less support and parts availability for 1991 BMW 525. In addition, the cost of maintenance, including insurance, on 1991 BMW 525 would be higher. At 3,245 cc (6 cylinders), 2006 BMW MM Roadster is equipped with a bigger engine. In terms of performance, 2006 BMW MM Roadster (330 HP @ 7900 RPM) has 187 more horse power than 1991 BMW 525. (143 HP @ 4800 RPM). In normal driving conditions, 2006 BMW MM Roadster should accelerate faster than 1991 BMW 525.
Let's talk about torque, 2006 BMW MM Roadster (355 Nm @ 4900 RPM) has 95 more torque (in Nm) than 1991 BMW 525. (260 Nm @ 2200 RPM). This means 2006 BMW MM Roadster will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 525.
Compare all specifications:
| 2006 BMW MM Roadster | 1991 BMW 525 | |
| Make | BMW | BMW |
| Model | MM Roadster | 525 |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 3245 cc | 2496 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 330 HP | 143 HP |
| Engine RPM | 7900 RPM | 4800 RPM |
| Torque | 355 Nm | 260 Nm |
| Torque RPM | 4900 RPM | 2200 RPM |
| Engine Compression Ratio | 11.5:1 | 22.0:1 |
| Fuel Type | Gasoline | Diesel |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Length | 4120 mm | 4730 mm |
| Vehicle Width | 1790 mm | 1760 mm |
| Vehicle Height | 1310 mm | 1420 mm |
| Wheelbase Size | 2500 mm | 2770 mm |
| Fuel Tank Capacity | 55 L | 80 L |
