1977 BMW 520 vs. 2006 BMW X5
To start off, 2006 BMW X5 is newer by 29 year(s). Which means there will be less support and parts availability for 1977 BMW 520. In addition, the cost of maintenance, including insurance, on 1977 BMW 520 would be higher. At 2,978 cc (6 cylinders), 2006 BMW X5 is equipped with a bigger engine. In terms of performance, 2006 BMW X5 (227 HP @ 5900 RPM) has 93 more horse power than 1977 BMW 520. (134 HP @ 4000 RPM) In normal driving conditions, 2006 BMW X5 should accelerate faster than 1977 BMW 520. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW X5 weights approximately 505 kg more than 1977 BMW 520. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1977 BMW 520. In wet, icy, snow, or gravel driving conditions, 2006 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, 2006 BMW X5 (290 Nm @ 3500 RPM) has 10 more torque (in Nm) than 1977 BMW 520. (280 Nm @ 1750 RPM). This means 2006 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1977 BMW 520.
Compare all specifications:
| 1977 BMW 520 | 2006 BMW X5 | |
| Make | BMW | BMW |
| Model | 520 | X5 |
| Year Released | 1977 | 2006 |
| Body Type | Sedan | SUV |
| Engine Position | Front | Front |
| Engine Size | 1951 cc | 2978 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 134 HP | 227 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 280 Nm | 290 Nm |
| Torque RPM | 1750 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 84.1 mm |
| Engine Stroke Size | 88 mm | 89.7 mm |
| Engine Compression Ratio | 19.0:1 | 10.2:1 |
| Top Speed | 206 km/hour | 209 km/hour |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1565 kg | 2070 kg |
| Vehicle Length | 4780 mm | 4670 mm |
| Vehicle Width | 1810 mm | 1880 mm |
| Vehicle Height | 1440 mm | 1770 mm |
| Wheelbase Size | 2840 mm | 2830 mm |
| Fuel Consumption Overall | 5.9 L/100km | 12.7 L/100km |
| Fuel Tank Capacity | 70 L | 93 L |
