1973 Innocenti J4 vs. 1978 Mazda RX-3
To start off, 1978 Mazda RX-3 is newer by 5 year(s). Which means there will be less support and parts availability for 1973 Innocenti J4. In addition, the cost of maintenance, including insurance, on 1973 Innocenti J4 would be higher. At 1,963 cc, 1978 Mazda RX-3 is equipped with a bigger engine. In terms of performance, 1978 Mazda RX-3 (100 HP @ 7000 RPM) has 44 more horse power than 1973 Innocenti J4. (56 HP @ 5500 RPM) In normal driving conditions, 1978 Mazda RX-3 should accelerate faster than 1973 Innocenti J4. With that said, vehicle weight also plays an important factor in acceleration. 1973 Innocenti J4 weights approximately 30 kg more than 1978 Mazda RX-3.
Because 1978 Mazda RX-3 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 1978 Mazda RX-3. 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, 1978 Mazda RX-3 (135 Nm @ 4000 RPM) has 52 more torque (in Nm) than 1973 Innocenti J4. (83 Nm @ 2500 RPM). This means 1978 Mazda RX-3 will have an easier job in driving up hills or pulling heavy equipment than 1973 Innocenti J4.
Compare all specifications:
| 1973 Innocenti J4 | 1978 Mazda RX-3 | |
| Make | Innocenti | Mazda |
| Model | J4 | RX-3 |
| Year Released | 1973 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 1097 cc | 1963 cc |
| Engine Type | in-line | dual-disk rotary |
| Horse Power | 56 HP | 100 HP |
| Engine RPM | 5500 RPM | 7000 RPM |
| Torque | 83 Nm | 135 Nm |
| Torque RPM | 2500 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Rear |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 880 kg | 850 kg |
| Vehicle Length | 3720 mm | 4090 mm |
| Vehicle Width | 1540 mm | 1600 mm |
| Vehicle Height | 1380 mm | 1380 mm |
| Wheelbase Size | 2380 mm | 2320 mm |
