1981 Renault 9 vs. 1991 Renault 21
To start off, 1991 Renault 21 is newer by 10 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. Both 1981 Renault 9 and 1991 Renault 21 are equipped with a 1,721 cc engine. In terms of performance, 1981 Renault 9 (85 HP @ 5000 RPM) has 10 more horse power than 1991 Renault 21. (75 HP @ 5000 RPM). In normal driving conditions, 1981 Renault 9 should accelerate faster than 1991 Renault 21. With that said, vehicle weight also plays an important factor in acceleration. 1991 Renault 21 weights approximately 49 kg more than 1981 Renault 9.
Let's talk about torque, 1981 Renault 9 (139 Nm @ 3250 RPM) has 10 more torque (in Nm) than 1991 Renault 21. (129 Nm @ 3250 RPM). This means 1981 Renault 9 will have an easier job in driving up hills or pulling heavy equipment than 1991 Renault 21.
Compare all specifications:
| 1981 Renault 9 | 1991 Renault 21 | |
| Make | Renault | Renault |
| Model | 9 | 21 |
| Year Released | 1981 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 1721 cc | 1721 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 85 HP | 75 HP |
| Engine RPM | 5000 RPM | 5000 RPM |
| Torque | 139 Nm | 129 Nm |
| Torque RPM | 3250 RPM | 3250 RPM |
| Engine Bore Size | 81 mm | 81.1 mm |
| Engine Stroke Size | 83.5 mm | 83.5 mm |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 906 kg | 955 kg |
| Vehicle Length | 4070 mm | 4470 mm |
| Vehicle Width | 1660 mm | 1730 mm |
| Vehicle Height | 1410 mm | 1430 mm |
| Wheelbase Size | 2490 mm | 2550 mm |
