1973 Citroen SM vs. 1992 Renault 21
To start off, 1992 Renault 21 is newer by 19 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 (180 HP) has 89 more horse power than 1992 Renault 21. (91 HP). In normal driving conditions, 1973 Citroen SM should accelerate faster than 1992 Renault 21.
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, 1973 Citroen SM (233 Nm) has 95 more torque (in Nm) than 1992 Renault 21. (138 Nm). This means 1973 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1992 Renault 21.
Compare all specifications:
| 1973 Citroen SM | 1992 Renault 21 | |
| Make | Citroen | Renault |
| Model | SM | 21 |
| Year Released | 1973 | 1992 |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1721 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 180 HP | 91 HP |
| Torque | 233 Nm | 138 Nm |
| Engine Bore Size | 86.9 mm | 81 mm |
| Engine Stroke Size | 74.9 mm | 83.5 mm |
| Engine Compression Ratio | 9.0:1 | 10.0:1 |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Vehicle Length | 4920 mm | 4650 mm |
| Vehicle Width | 1840 mm | 1720 mm |
| Vehicle Height | 1330 mm | 1430 mm |
| Wheelbase Size | 2960 mm | 2820 mm |
