1953 Allard J2 vs. 1956 Armstrong Siddeley Sapphire
To start off, 1956 Armstrong Siddeley Sapphire is newer by 3 year(s). Which means there will be less support and parts availability for 1953 Allard J2. In addition, the cost of maintenance, including insurance, on 1953 Allard J2 would be higher. At 5,416 cc (8 cylinders), 1953 Allard J2 is equipped with a bigger engine. In terms of performance, 1953 Allard J2 (158 HP @ 3800 RPM) has 73 more horse power than 1956 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM). In normal driving conditions, 1953 Allard J2 should accelerate faster than 1956 Armstrong Siddeley Sapphire. With that said, vehicle weight also plays an important factor in acceleration. 1956 Armstrong Siddeley Sapphire weights approximately 380 kg more than 1953 Allard J2.
Compare all specifications:
| 1953 Allard J2 | 1956 Armstrong Siddeley Sapphire | |
| Make | Allard | Armstrong Siddeley |
| Model | J2 | Sapphire |
| Year Released | 1953 | 1956 |
| Engine Position | Front | Front |
| Engine Size | 5416 cc | 2307 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 158 HP | 85 HP |
| Engine RPM | 3800 RPM | 4400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 980 kg | 1360 kg |
| Vehicle Length | 3780 mm | 4580 mm |
| Vehicle Width | 1730 mm | 1730 mm |
| Vehicle Height | 1300 mm | 1570 mm |
| Wheelbase Size | 2550 mm | 2900 mm |
