1976 Renault 15 vs. 1989 Renault 21
To start off, 1989 Renault 21 is newer by 13 year(s). Which means there will be less support and parts availability for 1976 Renault 15. In addition, the cost of maintenance, including insurance, on 1976 Renault 15 would be higher. At 1,721 cc (4 cylinders), 1989 Renault 21 is equipped with a bigger engine. In terms of performance, 1989 Renault 21 (91 HP @ 5200 RPM) has 32 more horse power than 1976 Renault 15. (59 HP @ 5500 RPM) In normal driving conditions, 1989 Renault 21 should accelerate faster than 1976 Renault 15. With that said, vehicle weight also plays an important factor in acceleration. 1989 Renault 21 weights approximately 110 kg more than 1976 Renault 15. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1989 Renault 21 (138 Nm @ 3500 RPM) has 40 more torque (in Nm) than 1976 Renault 15. (98 Nm @ 3500 RPM). This means 1989 Renault 21 will have an easier job in driving up hills or pulling heavy equipment than 1976 Renault 15.
Compare all specifications:
| 1976 Renault 15 | 1989 Renault 21 | |
| Make | Renault | Renault |
| Model | 15 | 21 |
| Year Released | 1976 | 1989 |
| Engine Position | Front | Front |
| Engine Size | 1289 cc | 1721 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 59 HP | 91 HP |
| Engine RPM | 5500 RPM | 5200 RPM |
| Torque | 98 Nm | 138 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 965 kg | 1075 kg |
| Vehicle Length | 4260 mm | 4650 mm |
| Vehicle Width | 1640 mm | 1720 mm |
| Vehicle Height | 1310 mm | 1430 mm |
| Wheelbase Size | 2440 mm | 2820 mm |
