2007 BMW X5 vs. 1981 BMW 745
To start off, 2007 BMW X5 is newer by 26 year(s). Which means there will be less support and parts availability for 1981 BMW 745. In addition, the cost of maintenance, including insurance, on 1981 BMW 745 would be higher. At 3,430 cc (6 cylinders), 1981 BMW 745 is equipped with a bigger engine. In terms of performance, 1981 BMW 745 (252 HP @ 5200 RPM) has 50 more horse power than 2007 BMW X5. (202 HP @ 4000 RPM) In normal driving conditions, 1981 BMW 745 should accelerate faster than 2007 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 503 kg more than 1981 BMW 745.
Because 2007 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1981 BMW 745. In wet, icy, snow, or gravel driving conditions, 2007 BMW X5 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, 2007 BMW X5 (480 Nm @ 2000 RPM) has 100 more torque (in Nm) than 1981 BMW 745. (380 Nm @ 2200 RPM). This means 2007 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 745. 1981 BMW 745 has automatic transmission and 2007 BMW X5 has manual transmission. 2007 BMW X5 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1981 BMW 745 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW X5 | 1981 BMW 745 | |
| Make | BMW | BMW |
| Model | X5 | 745 |
| Year Released | 2007 | 1981 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 3430 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 202 HP | 252 HP |
| Engine RPM | 4000 RPM | 5200 RPM |
| Torque | 480 Nm | 380 Nm |
| Torque RPM | 2000 RPM | 2200 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 88 mm | 86 mm |
| Engine Compression Ratio | 18.0:1 | 8.0:1 |
| Top Speed | 210 km/hour | 227 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 2099 kg | 1596 kg |
| Vehicle Length | 4670 mm | 4870 mm |
| Vehicle Width | 1720 mm | 1810 mm |
| Vehicle Height | 1880 mm | 1440 mm |
| Wheelbase Size | 2830 mm | 2770 mm |
| Fuel Tank Capacity | 93 L | 100 L |
