1981 BMW 725 vs. 2008 BMW X6
To start off, 2008 BMW X6 is newer by 27 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 4,399 cc (8 cylinders), 2008 BMW X6 is equipped with a bigger engine. In terms of performance, 2008 BMW X6 (400 HP @ 5500 RPM) has 252 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 2008 BMW X6 should accelerate faster than 1981 BMW 725.
Because 2008 BMW X6 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 725. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 BMW X6 (827 Nm @ 1800 RPM) has 612 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 2008 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 | 2008 BMW X6 | |
| Make | BMW | BMW |
| Model | 725 | X6 |
| Year Released | 1981 | 2008 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 2493 cc | 4399 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 148 HP | 400 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 215 Nm | 827 Nm |
| Torque RPM | 4000 RPM | 1800 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Width | 1810 mm | 1830 mm |
