1981 Renault 9 vs. 2011 Citroen C4
To start off, 2011 Citroen C4 is newer by 30 year(s). Which means there will be less support and parts availability for 1981 Renault 9. In addition, the cost of maintenance, including insurance, on 1981 Renault 9 would be higher. At 1,721 cc (4 cylinders), 1981 Renault 9 is equipped with a bigger engine. In terms of performance, 2011 Citroen C4 (108 HP @ 4000 RPM) has 23 more horse power than 1981 Renault 9. (85 HP @ 5000 RPM) In normal driving conditions, 2011 Citroen C4 should accelerate faster than 1981 Renault 9. With that said, vehicle weight also plays an important factor in acceleration. 2011 Citroen C4 weights approximately 449 kg more than 1981 Renault 9. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2011 Citroen C4 (241 Nm @ 1750 RPM) has 102 more torque (in Nm) than 1981 Renault 9. (139 Nm @ 3250 RPM). This means 2011 Citroen C4 will have an easier job in driving up hills or pulling heavy equipment than 1981 Renault 9.
Compare all specifications:
| 1981 Renault 9 | 2011 Citroen C4 | |
| Make | Renault | Citroen |
| Model | 9 | C4 |
| Year Released | 1981 | 2011 |
| Engine Position | Front | Front |
| Engine Size | 1721 cc | 1560 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 85 HP | 108 HP |
| Engine RPM | 5000 RPM | 4000 RPM |
| Torque | 139 Nm | 241 Nm |
| Torque RPM | 3250 RPM | 1750 RPM |
| Engine Bore Size | 81 mm | 75 mm |
| Engine Stroke Size | 83.5 mm | 88 mm |
| Fuel Type | Gasoline | Diesel |
| Vehicle Weight | 906 kg | 1355 kg |
| Vehicle Length | 4070 mm | 4270 mm |
| Vehicle Width | 1660 mm | 1780 mm |
| Vehicle Height | 1410 mm | 1460 mm |
| Wheelbase Size | 2490 mm | 2610 mm |
