2003 Opel Signum vs. 1975 Opel Kadett
To start off, 2003 Opel Signum is newer by 28 year(s). Which means there will be less support and parts availability for 1975 Opel Kadett. In addition, the cost of maintenance, including insurance, on 1975 Opel Kadett would be higher. At 2,958 cc (6 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (175 HP @ 4000 RPM) has 77 more horse power than 1975 Opel Kadett. (98 HP @ 5200 RPM). In normal driving conditions, 2003 Opel Signum should accelerate faster than 1975 Opel Kadett. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 840 kg more than 1975 Opel Kadett. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1975 Opel Kadett 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 1975 Opel Kadett. 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 (370 Nm @ 1900 RPM) has 222 more torque (in Nm) than 1975 Opel Kadett. (148 Nm @ 3400 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1975 Opel Kadett.
Compare all specifications:
| 2003 Opel Signum | 1975 Opel Kadett | |
| Make | Opel | Opel |
| Model | Signum | Kadett |
| Year Released | 2003 | 1975 |
| Body Type | Hatchback | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2958 cc | 1897 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 175 HP | 98 HP |
| Engine RPM | 4000 RPM | 5200 RPM |
| Torque | 370 Nm | 148 Nm |
| Torque RPM | 1900 RPM | 3400 RPM |
| Engine Bore Size | 87.5 mm | 93 mm |
| Engine Stroke Size | 82 mm | 69.8 mm |
| Engine Compression Ratio | 18.5:1 | 9.2:1 |
| Top Speed | 221 km/hour | 190 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1670 kg | 830 kg |
| Vehicle Length | 4640 mm | 4130 mm |
| Vehicle Width | 1800 mm | 1590 mm |
| Vehicle Height | 1470 mm | 1290 mm |
| Wheelbase Size | 2700 mm | 2520 mm |
| Fuel Consumption Overall | 7.4 L/100km | 7.5 L/100km |
| Fuel Tank Capacity | 60 L | 43 L |
