2007 BMW X3 vs. 1981 BMW 745
To start off, 2007 BMW X3 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, 2007 BMW X3 (268 HP @ 6600 RPM) has 16 more horse power than 1981 BMW 745. (252 HP @ 5200 RPM). In normal driving conditions, 2007 BMW X3 should accelerate faster than 1981 BMW 745. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X3 weights approximately 219 kg more than 1981 BMW 745. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X3 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 X3 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, 1981 BMW 745 (380 Nm @ 2200 RPM) has 65 more torque (in Nm) than 2007 BMW X3. (315 Nm @ 2750 RPM). This means 1981 BMW 745 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW X3.
Compare all specifications:
| 2007 BMW X3 | 1981 BMW 745 | |
| Make | BMW | BMW |
| Model | X3 | 745 |
| Year Released | 2007 | 1981 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 3430 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 268 HP | 252 HP |
| Engine RPM | 6600 RPM | 5200 RPM |
| Torque | 315 Nm | 380 Nm |
| Torque RPM | 2750 RPM | 2200 RPM |
| Engine Bore Size | 85 mm | 92 mm |
| Engine Stroke Size | 88 mm | 86 mm |
| Engine Compression Ratio | 10.7:1 | 8.0:1 |
| Top Speed | 210 km/hour | 227 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1815 kg | 1596 kg |
| Vehicle Length | 4570 mm | 4870 mm |
| Vehicle Width | 1680 mm | 1810 mm |
| Vehicle Height | 1860 mm | 1440 mm |
| Wheelbase Size | 2800 mm | 2770 mm |
| Fuel Tank Capacity | 67 L | 100 L |
