2007 Citroen C4 vs. 1974 Citroen SM
To start off, 2007 Citroen C4 is newer by 33 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, 2007 Citroen C4 (181 HP @ 7000 RPM) has 11 more horse power than 1974 Citroen SM. (170 HP @ 5500 RPM). In normal driving conditions, 2007 Citroen C4 should accelerate faster than 1974 Citroen SM. With that said, vehicle weight also plays an important factor in acceleration. 1974 Citroen SM weights approximately 112 kg more than 2007 Citroen C4.
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, 1974 Citroen SM (237 Nm @ 4000 RPM) has 57 more torque (in Nm) than 2007 Citroen C4. (180 Nm @ 7000 RPM). This means 1974 Citroen SM will have an easier job in driving up hills or pulling heavy equipment than 2007 Citroen C4.
Compare all specifications:
| 2007 Citroen C4 | 1974 Citroen SM | |
| Make | Citroen | Citroen |
| Model | C4 | SM |
| Year Released | 2007 | 1974 |
| Body Type | Hatchback | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1997 cc | 2670 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 181 HP | 170 HP |
| Engine RPM | 7000 RPM | 5500 RPM |
| Torque | 180 Nm | 237 Nm |
| Torque RPM | 7000 RPM | 4000 RPM |
| Engine Bore Size | 85 mm | 87.1 mm |
| Engine Stroke Size | 88 mm | 75 mm |
| Engine Compression Ratio | 10.8:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 3 doors | 2 doors |
| Vehicle Weight | 1338 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 |
