2003 Opel Signum vs. 1956 Rover P4
To start off, 2003 Opel Signum is newer by 47 year(s). Which means there will be less support and parts availability for 1956 Rover P4. In addition, the cost of maintenance, including insurance, on 1956 Rover P4 would be higher. At 3,173 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (208 HP @ 6200 RPM) has 100 more horse power than 1956 Rover P4. (108 HP @ 4250 RPM). In normal driving conditions, 2003 Opel Signum should accelerate faster than 1956 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 162 kg more than 1956 Rover P4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1956 Rover P4 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 1956 Rover P4. However, in wet, icy, snow, or gravel driving conditions, 2003 Opel Signum, 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, 2003 Opel Signum (300 Nm @ 4000 RPM) has 94 more torque (in Nm) than 1956 Rover P4. (206 Nm @ 2500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1956 Rover P4.
Compare all specifications:
| 2003 Opel Signum | 1956 Rover P4 | |
| Make | Opel | Rover |
| Model | Signum | P4 |
| Year Released | 2003 | 1956 |
| Engine Position | Front | Front |
| Engine Size | 3173 cc | 2636 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 208 HP | 108 HP |
| Engine RPM | 6200 RPM | 4250 RPM |
| Torque | 300 Nm | 206 Nm |
| Torque RPM | 4000 RPM | 2500 RPM |
| Engine Bore Size | 87.5 mm | 73 mm |
| Engine Stroke Size | 88 mm | 105 mm |
| Engine Compression Ratio | 10.0:1 | 8.5:1 |
| Top Speed | 237 km/hour | 153 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1610 kg | 1448 kg |
| Vehicle Length | 4640 mm | 4530 mm |
| Vehicle Width | 1800 mm | 1670 mm |
| Vehicle Height | 1470 mm | 1320 mm |
| Wheelbase Size | 2740 mm | 2830 mm |
| Fuel Tank Capacity | 52 L | 52 L |
