1975 Mazda 929 vs. 2003 Opel Astra
To start off, 2003 Opel Astra is newer by 28 year(s). Which means there will be less support and parts availability for 1975 Mazda 929. In addition, the cost of maintenance, including insurance, on 1975 Mazda 929 would be higher. At 1,796 cc (4 cylinders), 2003 Opel Astra is equipped with a bigger engine. In terms of performance, 2003 Opel Astra (123 HP @ 5600 RPM) has 40 more horse power than 1975 Mazda 929. (83 HP @ 5000 RPM) In normal driving conditions, 2003 Opel Astra should accelerate faster than 1975 Mazda 929. With that said, vehicle weight also plays an important factor in acceleration. 2003 Opel Astra weights approximately 240 kg more than 1975 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, 2003 Opel Astra (171 Nm @ 3800 RPM) has 37 more torque (in Nm) than 1975 Mazda 929. (134 Nm @ 3000 RPM). This means 2003 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 1975 Mazda 929.
Compare all specifications:
| 1975 Mazda 929 | 2003 Opel Astra | |
| Make | Mazda | Opel |
| Model | 929 | Astra |
| Year Released | 1975 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1769 cc | 1796 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 83 HP | 123 HP |
| Engine RPM | 5000 RPM | 5600 RPM |
| Torque | 134 Nm | 171 Nm |
| Torque RPM | 3000 RPM | 3800 RPM |
| Engine Bore Size | 80.1 mm | 80.5 mm |
| Engine Stroke Size | 88 mm | 88.2 mm |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1070 kg | 1310 kg |
| Vehicle Length | 4410 mm | 4260 mm |
| Vehicle Width | 1670 mm | 1760 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2520 mm | 2700 mm |
| Fuel Tank Capacity | 55 L | 52 L |
