1971 Citroen SM vs. 2007 Citroen C4
To start off, 2007 Citroen C4 is newer by 36 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 @ 5500 RPM) has 24 more horse power than 2007 Citroen C4. (134 HP @ 6000 RPM). In normal driving conditions, 1971 Citroen SM should accelerate faster than 2007 Citroen C4. With that said, vehicle weight also plays an important factor in acceleration. 1971 Citroen SM weights approximately 113 kg more than 2007 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, 1971 Citroen SM (235 Nm @ 4000 RPM) has 45 more torque (in Nm) than 2007 Citroen C4. (190 Nm @ 4100 RPM). This means 1971 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 2007 Citroen C4.
Compare all specifications:
| 1971 Citroen SM | 2007 Citroen C4 | |
| Make | Citroen | Citroen |
| Model | SM | C4 |
| Year Released | 1971 | 2007 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2670 cc | 1997 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 158 HP | 134 HP |
| Engine RPM | 5500 RPM | 6000 RPM |
| Torque | 235 Nm | 190 Nm |
| Torque RPM | 4000 RPM | 4100 RPM |
| Engine Bore Size | 87 mm | 85 mm |
| Engine Stroke Size | 75 mm | 88 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1450 kg | 1337 kg |
| Vehicle Length | 4900 mm | 4280 mm |
| Vehicle Width | 1850 mm | 1780 mm |
| Vehicle Height | 1330 mm | 1460 mm |
| Wheelbase Size | 2950 mm | 2610 mm |
| Fuel Tank Capacity | 89 L | 60 L |
