1981 BMW 525 vs. 2005 Mercury Mariner
To start off, 2005 Mercury Mariner is newer by 24 year(s). Which means there will be less support and parts availability for 1981 BMW 525. In addition, the cost of maintenance, including insurance, on 1981 BMW 525 would be higher. At 2,999 cc (6 cylinders), 2005 Mercury Mariner is equipped with a bigger engine. In terms of performance, 2005 Mercury Mariner (201 HP) has 53 more horse power than 1981 BMW 525. (148 HP) In normal driving conditions, 2005 Mercury Mariner should accelerate faster than 1981 BMW 525. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercury Mariner weights approximately 291 kg more than 1981 BMW 525. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Mercury Mariner is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 525. In wet, icy, snow, or gravel driving conditions, 2005 Mercury Mariner 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, 2005 Mercury Mariner (262 Nm) has 47 more torque (in Nm) than 1981 BMW 525. (215 Nm). This means 2005 Mercury Mariner will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 525.
Compare all specifications:
| 1981 BMW 525 | 2005 Mercury Mariner | |
| Make | BMW | Mercury |
| Model | 525 | Mariner |
| Year Released | 1981 | 2005 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 2495 cc | 2999 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 148 HP | 201 HP |
| Torque | 215 Nm | 262 Nm |
| Engine Bore Size | 86.1 mm | 89 mm |
| Engine Stroke Size | 71.6 mm | 80 mm |
| Engine Compression Ratio | 9.6:1 | 10.0:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1280 kg | 1571 kg |
| Vehicle Length | 4780 mm | 4430 mm |
| Vehicle Width | 1810 mm | 1790 mm |
| Vehicle Height | 1440 mm | 1730 mm |
| Wheelbase Size | 2630 mm | 2630 mm |
| Fuel Consumption | 7.2 L/100km | 10.2 L/100km |
| Fuel Consumption City | 13.1 L/100km | 13.1 L/100km |
| Fuel Consumption Overall | 9.4 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 70 L | 62 L |
