1953 Armstrong Siddeley Sapphire vs. 1973 Innocenti J4
To start off, 1973 Innocenti J4 is newer by 20 year(s). Which means there will be less support and parts availability for 1953 Armstrong Siddeley Sapphire. In addition, the cost of maintenance, including insurance, on 1953 Armstrong Siddeley Sapphire would be higher. At 3,435 cc (6 cylinders), 1953 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 1953 Armstrong Siddeley Sapphire (125 HP @ 4400 RPM) has 69 more horse power than 1973 Innocenti J4. (56 HP @ 5500 RPM). In normal driving conditions, 1953 Armstrong Siddeley Sapphire should accelerate faster than 1973 Innocenti J4. With that said, vehicle weight also plays an important factor in acceleration. 1953 Armstrong Siddeley Sapphire weights approximately 695 kg more than 1973 Innocenti J4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1953 Armstrong Siddeley Sapphire is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1953 Armstrong Siddeley Sapphire. However, in wet, icy, snow, or gravel driving conditions, 1973 Innocenti J4, being front wheel drive (FWD), will offer much better control with better grip. 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, 1953 Armstrong Siddeley Sapphire (239 Nm @ 1000 RPM) has 156 more torque (in Nm) than 1973 Innocenti J4. (83 Nm @ 2500 RPM). This means 1953 Armstrong Siddeley Sapphire will have an easier job in driving up hills or pulling heavy equipment than 1973 Innocenti J4.
Compare all specifications:
| 1953 Armstrong Siddeley Sapphire | 1973 Innocenti J4 | |
| Make | Armstrong Siddeley | Innocenti |
| Model | Sapphire | J4 |
| Year Released | 1953 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 3435 cc | 1097 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 125 HP | 56 HP |
| Engine RPM | 4400 RPM | 5500 RPM |
| Torque | 239 Nm | 83 Nm |
| Torque RPM | 1000 RPM | 2500 RPM |
| Engine Compression Ratio | 7.0:1 | 21.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 1575 kg | 880 kg |
| Vehicle Length | 4910 mm | 3720 mm |
| Vehicle Width | 1840 mm | 1540 mm |
| Vehicle Height | 1610 mm | 1380 mm |
| Wheelbase Size | 2900 mm | 2380 mm |
