1973 Citroen SM vs. 1981 Opel Ascona
To start off, 1981 Opel Ascona is newer by 8 year(s). Which means there will be less support and parts availability for 1973 Citroen SM. In addition, the cost of maintenance, including insurance, on 1973 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1973 Citroen SM is equipped with a bigger engine. In terms of performance, 1973 Citroen SM (171 HP @ 5500 RPM) has 97 more horse power than 1981 Opel Ascona. (74 HP @ 5800 RPM). In normal driving conditions, 1973 Citroen SM should accelerate faster than 1981 Opel Ascona. With that said, vehicle weight also plays an important factor in acceleration. 1973 Citroen SM weights approximately 530 kg more than 1981 Opel Ascona. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1973 Citroen SM (237 Nm @ 4000 RPM) has 136 more torque (in Nm) than 1981 Opel Ascona. (101 Nm @ 3800 RPM). This means 1973 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1981 Opel Ascona.
Compare all specifications:
| 1973 Citroen SM | 1981 Opel Ascona | |
| Make | Citroen | Opel |
| Model | SM | Ascona |
| Year Released | 1973 | 1981 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1295 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 171 HP | 74 HP |
| Engine RPM | 5500 RPM | 5800 RPM |
| Torque | 237 Nm | 101 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 87 mm | 75 mm |
| Engine Stroke Size | 75 mm | 73.4 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1450 kg | 920 kg |
| Vehicle Length | 4900 mm | 4380 mm |
| Vehicle Width | 1850 mm | 1680 mm |
| Vehicle Height | 1330 mm | 1400 mm |
| Wheelbase Size | 2960 mm | 2580 mm |
| Fuel Tank Capacity | 25 L | 70 L |
