2009 Citroen C4 vs. 1974 Citroen SM
To start off, 2009 Citroen C4 is newer by 35 year(s). Which means there will be less support and parts availability for 1974 Citroen SM. In addition, the cost of maintenance, including insurance, on 1974 Citroen SM would be higher. At 2,670 cc (6 cylinders), 1974 Citroen SM is equipped with a bigger engine. In terms of performance, 1974 Citroen SM (170 HP @ 5500 RPM) has 62 more horse power than 2009 Citroen C4. (108 HP @ 4000 RPM) In normal driving conditions, 1974 Citroen SM should accelerate faster than 2009 Citroen C4. With that said, vehicle weight also plays an important factor in acceleration. 1974 Citroen SM weights approximately 95 kg more than 2009 Citroen C4. 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, 2009 Citroen C4 (241 Nm @ 1750 RPM) has 4 more torque (in Nm) than 1974 Citroen SM. (237 Nm @ 4000 RPM). This means 2009 Citroen C4 will have an easier job in driving up hills or pulling heavy equipment than 1974 Citroen SM.
Compare all specifications:
| 2009 Citroen C4 | 1974 Citroen SM | |
| Make | Citroen | Citroen |
| Model | C4 | SM |
| Year Released | 2009 | 1974 |
| Body Type | Hatchback | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1560 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 108 HP | 170 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 241 Nm | 237 Nm |
| Torque RPM | 1750 RPM | 4000 RPM |
| Engine Bore Size | 75 mm | 87.1 mm |
| Engine Stroke Size | 88 mm | 75 mm |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1355 kg | 1450 kg |
| Vehicle Length | 4270 mm | 4900 mm |
| Vehicle Width | 1780 mm | 1850 mm |
| Vehicle Height | 1460 mm | 1330 mm |
| Wheelbase Size | 2610 mm | 2960 mm |
| Fuel Tank Capacity | 60 L | 25 L |
