1973 Innocenti J4 vs. 2008 Opel Signum
To start off, 2008 Opel Signum is newer by 35 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 2,957 cc (6 cylinders), 2008 Opel Signum is equipped with a bigger engine. In terms of performance, 2008 Opel Signum (175 HP @ 4000 RPM) has 119 more horse power than 1973 Innocenti J4. (56 HP @ 5500 RPM) In normal driving conditions, 2008 Opel Signum should accelerate faster than 1973 Innocenti J4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Opel Signum weights approximately 790 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.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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, 2008 Opel Signum (370 Nm @ 1900 RPM) has 287 more torque (in Nm) than 1973 Innocenti J4. (83 Nm @ 2500 RPM). This means 2008 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1973 Innocenti J4. 2008 Opel Signum has automatic transmission and 1973 Innocenti J4 has manual transmission. 1973 Innocenti J4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Opel Signum will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1973 Innocenti J4 | 2008 Opel Signum | |
| Make | Innocenti | Opel |
| Model | J4 | Signum |
| Year Released | 1973 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 1097 cc | 2957 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 56 HP | 175 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 83 Nm | 370 Nm |
| Torque RPM | 2500 RPM | 1900 RPM |
| Engine Bore Size | 64.6 mm | 87.5 mm |
| Engine Stroke Size | 83.7 mm | 82 mm |
| Engine Compression Ratio | 21.5:1 | 18.5:1 |
| Fuel Type | Gasoline | Diesel |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 880 kg | 1670 kg |
| Vehicle Length | 3720 mm | 4640 mm |
| Vehicle Width | 1540 mm | 1800 mm |
| Vehicle Height | 1380 mm | 1470 mm |
| Wheelbase Size | 2380 mm | 2840 mm |
