2006 Citroen C4 vs. 1981 Renault 18
To start off, 2006 Citroen C4 is newer by 25 year(s). Which means there will be less support and parts availability for 1981 Renault 18. In addition, the cost of maintenance, including insurance, on 1981 Renault 18 would be higher. At 2,068 cc (4 cylinders), 1981 Renault 18 is equipped with a bigger engine. In terms of performance, 2006 Citroen C4 (108 HP @ 4000 RPM) has 42 more horse power than 1981 Renault 18. (66 HP @ 4500 RPM). In normal driving conditions, 2006 Citroen C4 should accelerate faster than 1981 Renault 18. With that said, vehicle weight also plays an important factor in acceleration. 2006 Citroen C4 weights approximately 305 kg more than 1981 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, 2006 Citroen C4 (240 Nm @ 1750 RPM) has 116 more torque (in Nm) than 1981 Renault 18. (124 Nm @ 2250 RPM). This means 2006 Citroen C4 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 18.
Compare all specifications:
| 2006 Citroen C4 | 1981 Renault 18 | |
| Make | Citroen | Renault |
| Model | C4 | 18 |
| Year Released | 2006 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 1560 cc | 2068 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 108 HP | 66 HP |
| Engine RPM | 4000 RPM | 4500 RPM |
| Torque | 240 Nm | 124 Nm |
| Torque RPM | 1750 RPM | 2250 RPM |
| Engine Bore Size | 75 mm | 86.1 mm |
| Engine Stroke Size | 88 mm | 89 mm |
| Fuel Type | Diesel | Diesel |
| Drive Type | Front | Front |
| Vehicle Weight | 1355 kg | 1050 kg |
| Vehicle Length | 4270 mm | 4410 mm |
| Vehicle Width | 1780 mm | 1710 mm |
| Vehicle Height | 1460 mm | 1410 mm |
| Wheelbase Size | 2610 mm | 2450 mm |
