1986 BMW M6 vs. 1991 BMW 525
To start off, 1991 BMW 525 is newer by 5 year(s). Which means there will be less support and parts availability for 1986 BMW M6. In addition, the cost of maintenance, including insurance, on 1986 BMW M6 would be higher. At 3,453 cc (6 cylinders), 1986 BMW M6 is equipped with a bigger engine. In terms of performance, 1986 BMW M6 (282 HP @ 6500 RPM) has 139 more horse power than 1991 BMW 525. (143 HP @ 4800 RPM). In normal driving conditions, 1986 BMW M6 should accelerate faster than 1991 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW 525 weights approximately 55 kg more than 1986 BMW M6.
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, 1986 BMW M6 (335 Nm @ 4500 RPM) has 75 more torque (in Nm) than 1991 BMW 525. (260 Nm @ 2200 RPM). This means 1986 BMW M6 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 525.
Compare all specifications:
| 1986 BMW M6 | 1991 BMW 525 | |
| Make | BMW | BMW |
| Model | M6 | 525 |
| Year Released | 1986 | 1991 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 3453 cc | 2496 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 282 HP | 143 HP |
| Engine RPM | 6500 RPM | 4800 RPM |
| Torque | 335 Nm | 260 Nm |
| Torque RPM | 4500 RPM | 2200 RPM |
| Engine Bore Size | 93.4 mm | 80 mm |
| Engine Stroke Size | 84 mm | 83 mm |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1505 kg | 1560 kg |
| Vehicle Length | 4760 mm | 4730 mm |
| Vehicle Width | 1730 mm | 1760 mm |
| Vehicle Height | 1360 mm | 1420 mm |
| Wheelbase Size | 2630 mm | 2770 mm |
| Fuel Tank Capacity | 70 L | 80 L |
