1978 Mazda 929 vs. 1958 Rover P4
To start off, 1978 Mazda 929 is newer by 20 year(s). Which means there will be less support and parts availability for 1958 Rover P4. In addition, the cost of maintenance, including insurance, on 1958 Rover P4 would be higher. At 2,230 cc (6 cylinders), 1958 Rover P4 is equipped with a bigger engine. In terms of performance, 1978 Mazda 929 (83 HP @ 5000 RPM) has 13 more horse power than 1958 Rover P4. (70 HP @ 4500 RPM). In normal driving conditions, 1978 Mazda 929 should accelerate faster than 1958 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1958 Rover P4 weights approximately 330 kg more than 1978 Mazda 929.
Let's talk about torque, 1958 Rover P4 (153 Nm @ 1750 RPM) has 19 more torque (in Nm) than 1978 Mazda 929. (134 Nm @ 3000 RPM). This means 1958 Rover P4 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mazda 929.
Compare all specifications:
| 1978 Mazda 929 | 1958 Rover P4 | |
| Make | Mazda | Rover |
| Model | 929 | P4 |
| Year Released | 1978 | 1958 |
| Engine Position | Front | Front |
| Engine Size | 1769 cc | 2230 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 83 HP | 70 HP |
| Engine RPM | 5000 RPM | 4500 RPM |
| Torque | 134 Nm | 153 Nm |
| Torque RPM | 3000 RPM | 1750 RPM |
| Engine Bore Size | 80 mm | 73 mm |
| Engine Stroke Size | 88 mm | 88.9 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1070 kg | 1400 kg |
| Vehicle Length | 4410 mm | 4540 mm |
| Vehicle Width | 1670 mm | 1680 mm |
| Vehicle Height | 1420 mm | 1620 mm |
| Wheelbase Size | 2520 mm | 2830 mm |
| Fuel Tank Capacity | 55 L | 45 L |
