1953 Alfa Romeo AR 51 vs. 1955 Armstrong Siddeley Sapphire
To start off, 1955 Armstrong Siddeley Sapphire is newer by 2 year(s). Which means there will be less support and parts availability for 1953 Alfa Romeo AR 51. In addition, the cost of maintenance, including insurance, on 1953 Alfa Romeo AR 51 would be higher. At 3,435 cc (6 cylinders), 1955 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 1955 Armstrong Siddeley Sapphire (125 HP @ 4700 RPM) has 62 more horse power than 1953 Alfa Romeo AR 51. (63 HP @ 4400 RPM) In normal driving conditions, 1955 Armstrong Siddeley Sapphire should accelerate faster than 1953 Alfa Romeo AR 51. With that said, vehicle weight also plays an important factor in acceleration. 1955 Armstrong Siddeley Sapphire weights approximately 580 kg more than 1953 Alfa Romeo AR 51. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1953 Alfa Romeo AR 51 is four wheel drive (4WD), it will have significant more traction and grip than 1955 Armstrong Siddeley Sapphire. In wet, icy, snow, or gravel driving conditions, 1953 Alfa Romeo AR 51 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.
Compare all specifications:
| 1953 Alfa Romeo AR 51 | 1955 Armstrong Siddeley Sapphire | |
| Make | Alfa Romeo | Armstrong Siddeley |
| Model | AR 51 | Sapphire |
| Year Released | 1953 | 1955 |
| Engine Position | Front | Front |
| Engine Size | 1884 cc | 3435 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 63 HP | 125 HP |
| Engine RPM | 4400 RPM | 4700 RPM |
| Engine Bore Size | 82.6 mm | 90 mm |
| Engine Stroke Size | 88 mm | 90 mm |
| Engine Compression Ratio | 7.0:1 | 7.0:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 7 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1250 kg | 1830 kg |
| Vehicle Length | 3530 mm | 5390 mm |
| Vehicle Width | 1580 mm | 1840 mm |
| Vehicle Height | 1830 mm | 1680 mm |
| Wheelbase Size | 2210 mm | 3380 mm |
