1951 Austin Princess vs. 2007 BMW X5
To start off, 2007 BMW X5 is newer by 56 year(s). Which means there will be less support and parts availability for 1951 Austin Princess. In addition, the cost of maintenance, including insurance, on 1951 Austin Princess would be higher. At 3,990 cc (6 cylinders), 1951 Austin Princess is equipped with a bigger engine. In terms of performance, 2007 BMW X5 (228 HP @ 5900 RPM) has 104 more horse power than 1951 Austin Princess. (124 HP @ 3800 RPM) In normal driving conditions, 2007 BMW X5 should accelerate faster than 1951 Austin Princess. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 115 kg more than 1951 Austin Princess. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1951 Austin Princess. 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 (300 Nm @ 3500 RPM) has 12 more torque (in Nm) than 1951 Austin Princess. (288 Nm @ 2200 RPM). This means 2007 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1951 Austin Princess.
Compare all specifications:
| 1951 Austin Princess | 2007 BMW X5 | |
| Make | Austin | BMW |
| Model | Princess | X5 |
| Year Released | 1951 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 3990 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 124 HP | 228 HP |
| Engine RPM | 3800 RPM | 5900 RPM |
| Torque | 288 Nm | 300 Nm |
| Torque RPM | 2200 RPM | 3500 RPM |
| Engine Bore Size | 87.3 mm | 84 mm |
| Engine Stroke Size | 111.1 mm | 89.6 mm |
| Engine Compression Ratio | 6.8:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Rear | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1955 kg | 2070 kg |
| Vehicle Length | 4880 mm | 4670 mm |
| Vehicle Width | 1860 mm | 1880 mm |
| Vehicle Height | 1710 mm | 1720 mm |
| Wheelbase Size | 3030 mm | 2830 mm |
| Fuel Tank Capacity | 34 L | 93 L |
