1972 Citroen SM vs. 1985 Renault 18
To start off, 1985 Renault 18 is newer by 13 year(s). Which means there will be less support and parts availability for 1972 Citroen SM. In addition, the cost of maintenance, including insurance, on 1972 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1972 Citroen SM is equipped with a bigger engine. In terms of performance, 1972 Citroen SM (158 HP @ 5500 RPM) has 54 more horse power than 1985 Renault 18. (104 HP @ 5500 RPM). In normal driving conditions, 1972 Citroen SM should accelerate faster than 1985 Renault 18. With that said, vehicle weight also plays an important factor in acceleration. 1972 Citroen SM weights approximately 317 kg more than 1985 Renault 18. 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, 1972 Citroen SM (235 Nm @ 4000 RPM) has 72 more torque (in Nm) than 1985 Renault 18. (163 Nm @ 3250 RPM). This means 1972 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 1985 Renault 18.
Compare all specifications:
| 1972 Citroen SM | 1985 Renault 18 | |
| Make | Citroen | Renault |
| Model | SM | 18 |
| Year Released | 1972 | 1985 |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1995 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 158 HP | 104 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 235 Nm | 163 Nm |
| Torque RPM | 4000 RPM | 3250 RPM |
| Engine Bore Size | 87 mm | 88 mm |
| Engine Stroke Size | 75 mm | 82 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 1452 kg | 1135 kg |
| Vehicle Length | 4900 mm | 4470 mm |
| Vehicle Width | 1850 mm | 1710 mm |
| Vehicle Height | 1330 mm | 1410 mm |
