1979 Mazda 121 vs. 1975 Renault 15
To start off, 1979 Mazda 121 is newer by 4 year(s). Which means there will be less support and parts availability for 1975 Renault 15. In addition, the cost of maintenance, including insurance, on 1975 Renault 15 would be higher. At 1,970 cc (4 cylinders), 1979 Mazda 121 is equipped with a bigger engine. In terms of performance, 1979 Mazda 121 (90 HP @ 4800 RPM) has 31 more horse power than 1975 Renault 15. (59 HP @ 5500 RPM). In normal driving conditions, 1979 Mazda 121 should accelerate faster than 1975 Renault 15. With that said, vehicle weight also plays an important factor in acceleration. 1979 Mazda 121 weights approximately 169 kg more than 1975 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, 1979 Mazda 121 (160 Nm @ 3000 RPM) has 61 more torque (in Nm) than 1975 Renault 15. (99 Nm @ 3500 RPM). This means 1979 Mazda 121 will have an easier job in driving up hills or pulling heavy equipment than 1975 Renault 15.
Compare all specifications:
| 1979 Mazda 121 | 1975 Renault 15 | |
| Make | Mazda | Renault |
| Model | 121 | 15 |
| Year Released | 1979 | 1975 |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 1289 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 90 HP | 59 HP |
| Engine RPM | 4800 RPM | 5500 RPM |
| Torque | 160 Nm | 99 Nm |
| Torque RPM | 3000 RPM | 3500 RPM |
| Engine Bore Size | 80 mm | 75 mm |
| Engine Stroke Size | 98 mm | 69 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 4 seats |
| Vehicle Weight | 1134 kg | 965 kg |
| Vehicle Length | 4510 mm | 4270 mm |
| Vehicle Width | 1690 mm | 1640 mm |
| Vehicle Height | 1350 mm | 1320 mm |
| Wheelbase Size | 2520 mm | 2440 mm |
