1978 Mazda 929 vs. 1986 Renault 21
To start off, 1986 Renault 21 is newer by 8 year(s). Which means there will be less support and parts availability for 1978 Mazda 929. In addition, the cost of maintenance, including insurance, on 1978 Mazda 929 would be higher. At 1,995 cc (4 cylinders), 1986 Renault 21 is equipped with a bigger engine. In terms of performance, 1986 Renault 21 (175 HP @ 5200 RPM) has 92 more horse power than 1978 Mazda 929. (83 HP @ 5000 RPM) In normal driving conditions, 1986 Renault 21 should accelerate faster than 1978 Mazda 929. With that said, vehicle weight also plays an important factor in acceleration. 1986 Renault 21 weights approximately 275 kg more than 1978 Mazda 929. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1986 Renault 21 (275 Nm @ 3000 RPM) has 141 more torque (in Nm) than 1978 Mazda 929. (134 Nm @ 3000 RPM). This means 1986 Renault 21 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mazda 929.
Compare all specifications:
| 1978 Mazda 929 | 1986 Renault 21 | |
| Make | Mazda | Renault |
| Model | 929 | 21 |
| Year Released | 1978 | 1986 |
| Engine Position | Front | Front |
| Engine Size | 1769 cc | 1995 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 83 HP | 175 HP |
| Engine RPM | 5000 RPM | 5200 RPM |
| Torque | 134 Nm | 275 Nm |
| Torque RPM | 3000 RPM | 3000 RPM |
| Engine Bore Size | 80 mm | 88 mm |
| Engine Stroke Size | 88 mm | 82 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1070 kg | 1345 kg |
| Vehicle Length | 4410 mm | 4540 mm |
| Vehicle Width | 1670 mm | 1730 mm |
| Vehicle Height | 1420 mm | 1430 mm |
| Wheelbase Size | 2520 mm | 2670 mm |
