1991 Citroen ZX vs. 2007 Opel Signum
To start off, 2007 Opel Signum is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Citroen ZX. In addition, the cost of maintenance, including insurance, on 1991 Citroen ZX would be higher. At 1,909 cc (4 cylinders), 2007 Opel Signum is equipped with a bigger engine. In terms of performance, 2007 Opel Signum (148 HP @ 4000 RPM) has 18 more horse power than 1991 Citroen ZX. (130 HP @ 6000 RPM) In normal driving conditions, 2007 Opel Signum should accelerate faster than 1991 Citroen ZX. With that said, vehicle weight also plays an important factor in acceleration. 2007 Opel Signum weights approximately 509 kg more than 1991 Citroen ZX. 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, 2007 Opel Signum (315 Nm @ 2000 RPM) has 155 more torque (in Nm) than 1991 Citroen ZX. (160 Nm @ 4750 RPM). This means 2007 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1991 Citroen ZX.
Compare all specifications:
| 1991 Citroen ZX | 2007 Opel Signum | |
| Make | Citroen | Opel |
| Model | ZX | Signum |
| Year Released | 1991 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 1905 cc | 1909 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 130 HP | 148 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 160 Nm | 315 Nm |
| Torque RPM | 4750 RPM | 2000 RPM |
| Engine Bore Size | 83 mm | 82 mm |
| Engine Stroke Size | 88 mm | 90.4 mm |
| Engine Compression Ratio | 9.6:1 | 18.0:1 |
| Top Speed | 200 km/hour | 209 km/hour |
| Acceleration 0-100mph | 9.5 seconds | 10.5 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1104 kg | 1613 kg |
| Vehicle Length | 4090 mm | 4640 mm |
| Vehicle Width | 1710 mm | 1800 mm |
| Vehicle Height | 1410 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2840 mm |
