1966 Fiat 500 vs. 1970 Innocenti J4
To start off, 1970 Innocenti J4 is newer by 4 year(s). Which means there will be less support and parts availability for 1966 Fiat 500. In addition, the cost of maintenance, including insurance, on 1966 Fiat 500 would be higher. At 1,098 cc (4 cylinders), 1970 Innocenti J4 is equipped with a bigger engine. In terms of performance, 1970 Innocenti J4 (56 HP @ 5600 RPM) has 34 more horse power than 1966 Fiat 500. (22 HP @ 4400 RPM) In normal driving conditions, 1970 Innocenti J4 should accelerate faster than 1966 Fiat 500. With that said, vehicle weight also plays an important factor in acceleration. 1970 Innocenti J4 weights approximately 312 kg more than 1966 Fiat 500. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1966 Fiat 500 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 1966 Fiat 500. However, in wet, icy, snow, or gravel driving conditions, 1970 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, 1970 Innocenti J4 (82 Nm @ 2000 RPM) has 46 more torque (in Nm) than 1966 Fiat 500. (36 Nm @ 2800 RPM). This means 1970 Innocenti J4 will have an easier job in driving up hills or pulling heavy equipment than 1966 Fiat 500.
Compare all specifications:
| 1966 Fiat 500 | 1970 Innocenti J4 | |
| Make | Fiat | Innocenti |
| Model | 500 | J4 |
| Year Released | 1966 | 1970 |
| Engine Position | Rear | Front |
| Engine Size | 499 cc | 1098 cc |
| Engine Cylinders | 2 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 22 HP | 56 HP |
| Engine RPM | 4400 RPM | 5600 RPM |
| Torque | 36 Nm | 82 Nm |
| Torque RPM | 2800 RPM | 2000 RPM |
| Engine Compression Ratio | 9.0:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 540 kg | 852 kg |
| Vehicle Length | 3190 mm | 3720 mm |
| Vehicle Width | 1330 mm | 1540 mm |
| Vehicle Height | 1360 mm | 1380 mm |
| Wheelbase Size | 1950 mm | 2380 mm |
