1954 Alfa Romeo AR 51 vs. 2006 BMW X5
To start off, 2006 BMW X5 is newer by 52 year(s). Which means there will be less support and parts availability for 1954 Alfa Romeo AR 51. In addition, the cost of maintenance, including insurance, on 1954 Alfa Romeo AR 51 would be higher. At 2,979 cc (6 cylinders), 2006 BMW X5 is equipped with a bigger engine. In terms of performance, 2006 BMW X5 (228 HP @ 3500 RPM) has 165 more horse power than 1954 Alfa Romeo AR 51. (63 HP @ 4400 RPM) In normal driving conditions, 2006 BMW X5 should accelerate faster than 1954 Alfa Romeo AR 51. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW X5 weights approximately 380 kg more than 1954 Alfa Romeo AR 51. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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.
Compare all specifications:
| 1954 Alfa Romeo AR 51 | 2006 BMW X5 | |
| Make | Alfa Romeo | BMW |
| Model | AR 51 | X5 |
| Year Released | 1954 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 1884 cc | 2979 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 63 HP | 228 HP |
| Engine RPM | 4400 RPM | 3500 RPM |
| Engine Bore Size | 82.6 mm | 84 mm |
| Engine Stroke Size | 88 mm | 89.6 mm |
| Engine Compression Ratio | 7.0:1 | 10.2:1 |
| Top Speed | 105 km/hour | 202 km/hour |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1250 kg | 1630 kg |
| Vehicle Length | 3530 mm | 4670 mm |
| Vehicle Width | 1580 mm | 1880 mm |
| Vehicle Height | 1830 mm | 1720 mm |
| Wheelbase Size | 2210 mm | 2830 mm |
