1978 Alfa Romeo Alfetta vs. 2003 Opel Signum
To start off, 2003 Opel Signum is newer by 25 year(s). Which means there will be less support and parts availability for 1978 Alfa Romeo Alfetta. In addition, the cost of maintenance, including insurance, on 1978 Alfa Romeo Alfetta would be higher. At 1,910 cc (4 cylinders), 2003 Opel Signum is equipped with a bigger engine. In terms of performance, 2003 Opel Signum (173 HP @ 5600 RPM) has 29 more horse power than 1978 Alfa Romeo Alfetta. (144 HP @ 6500 RPM) In normal driving conditions, 2003 Opel Signum should accelerate faster than 1978 Alfa Romeo Alfetta. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Signum weights approximately 145 kg more than 1978 Alfa Romeo Alfetta. 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, 2003 Opel Signum (280 Nm @ 2500 RPM) has 111 more torque (in Nm) than 1978 Alfa Romeo Alfetta. (169 Nm @ 3500 RPM). This means 2003 Opel Signum will have an easier job in driving up hills or pulling heavy equipment than 1978 Alfa Romeo Alfetta.
Compare all specifications:
| 1978 Alfa Romeo Alfetta | 2003 Opel Signum | |
| Make | Alfa Romeo | Opel |
| Model | Alfetta | Signum |
| Year Released | 1978 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1747 cc | 1910 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 144 HP | 173 HP |
| Engine RPM | 6500 RPM | 5600 RPM |
| Torque | 169 Nm | 280 Nm |
| Torque RPM | 3500 RPM | 2500 RPM |
| Engine Bore Size | 82 mm | 86 mm |
| Engine Stroke Size | 82.7 mm | 86 mm |
| Engine Compression Ratio | 10.3:1 | 9.5:1 |
| Top Speed | 210 km/hour | 220 km/hour |
| Acceleration 0-100mph | 9.2 seconds | 9.7 seconds |
| Drive Type | Front | Front |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1350 kg | 1495 kg |
| Vehicle Length | 4290 mm | 4640 mm |
| Vehicle Width | 1790 mm | 1800 mm |
| Vehicle Height | 1320 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2720 mm |
| Fuel Tank Capacity | 70 L | 58 L |
