1981 BMW 725 vs. 2012 BMW X6
To start off, 2012 BMW X6 is newer by 31 year(s). Which means there will be less support and parts availability for 1981 BMW 725. In addition, the cost of maintenance, including insurance, on 1981 BMW 725 would be higher. At 4,400 cc (8 cylinders), 2012 BMW X6 is equipped with a bigger engine. In terms of performance, 2012 BMW X6 (480 HP @ 5500 RPM) has 332 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 2012 BMW X6 should accelerate faster than 1981 BMW 725.
Because 2012 BMW X6 is all wheel drive (AWD), it will have significant more traction and grip than 1981 BMW 725. In wet, icy, snow, or gravel driving conditions, 2012 BMW X6 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, 2012 BMW X6 (779 Nm @ 1750 RPM) has 564 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 2012 BMW X6 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
| 1981 BMW 725 | 2012 BMW X6 | |
| Make | BMW | BMW |
| Model | 725 | X6 |
| Year Released | 1981 | 2012 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 2493 cc | 4400 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 148 HP | 480 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 215 Nm | 779 Nm |
| Torque RPM | 4000 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline / Electric Hybrid |
| Drive Type | Rear | AWD |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Length | 4870 mm | 4879 mm |
| Vehicle Width | 1810 mm | 1984 mm |
| Vehicle Height | 1440 mm | 1689 mm |
| Wheelbase Size | 2810 mm | 2934 mm |
