1971 Citroen SM vs. 1981 Renault 9
To start off, 1981 Renault 9 is newer by 10 year(s). Which means there will be less support and parts availability for 1971 Citroen SM. In addition, the cost of maintenance, including insurance, on 1971 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1971 Citroen SM is equipped with a bigger engine. In terms of performance, 1971 Citroen SM (158 HP) has 91 more horse power than 1981 Renault 9. (67 HP). In normal driving conditions, 1971 Citroen SM should accelerate faster than 1981 Renault 9. With that said, vehicle weight also plays an important factor in acceleration. 1971 Citroen SM weights approximately 590 kg more than 1981 Renault 9. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1971 Citroen SM (235 Nm @ 4000 RPM) has 125 more torque (in Nm) than 1981 Renault 9. (110 Nm @ 3000 RPM). This means 1971 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 9.
Compare all specifications:
| 1971 Citroen SM | 1981 Renault 9 | |
| Make | Citroen | Renault |
| Model | SM | 9 |
| Year Released | 1971 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1397 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 158 HP | 67 HP |
| Torque | 235 Nm | 110 Nm |
| Torque RPM | 4000 RPM | 3000 RPM |
| Engine Bore Size | 87 mm | 76 mm |
| Engine Stroke Size | 75 mm | 77 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1450 kg | 860 kg |
| Vehicle Length | 4900 mm | 4070 mm |
| Vehicle Width | 1850 mm | 1660 mm |
| Vehicle Height | 1330 mm | 1410 mm |
| Wheelbase Size | 2950 mm | 2490 mm |
| Fuel Tank Capacity | 89 L | 38 L |
