1963 Alfa Romeo Spider vs. 1973 Innocenti J4
To start off, 1973 Innocenti J4 is newer by 10 year(s). Which means there will be less support and parts availability for 1963 Alfa Romeo Spider. In addition, the cost of maintenance, including insurance, on 1963 Alfa Romeo Spider would be higher. At 2,580 cc (6 cylinders), 1963 Alfa Romeo Spider is equipped with a bigger engine. In terms of performance, 1963 Alfa Romeo Spider (163 HP @ 5900 RPM) has 107 more horse power than 1973 Innocenti J4. (56 HP @ 5500 RPM). In normal driving conditions, 1963 Alfa Romeo Spider should accelerate faster than 1973 Innocenti J4. With that said, vehicle weight also plays an important factor in acceleration. 1963 Alfa Romeo Spider weights approximately 450 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.
Let's talk about torque, 1963 Alfa Romeo Spider (220 Nm @ 4000 RPM) has 137 more torque (in Nm) than 1973 Innocenti J4. (83 Nm @ 2500 RPM). This means 1963 Alfa Romeo Spider will have an easier job in driving up hills or pulling heavy equipment than 1973 Innocenti J4.
Compare all specifications:
| 1963 Alfa Romeo Spider | 1973 Innocenti J4 | |
| Make | Alfa Romeo | Innocenti |
| Model | Spider | J4 |
| Year Released | 1963 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 2580 cc | 1097 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 163 HP | 56 HP |
| Engine RPM | 5900 RPM | 5500 RPM |
| Torque | 220 Nm | 83 Nm |
| Torque RPM | 4000 RPM | 2500 RPM |
| Engine Bore Size | 83 mm | 64.6 mm |
| Engine Stroke Size | 79.6 mm | 83.7 mm |
| Engine Compression Ratio | 9.2:1 | 21.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 2 seats |
| Vehicle Weight | 1330 kg | 880 kg |
| Vehicle Length | 4510 mm | 3720 mm |
| Vehicle Width | 1610 mm | 1540 mm |
| Vehicle Height | 1390 mm | 1380 mm |
| Wheelbase Size | 2510 mm | 2380 mm |
