1975 Mazda RX 4 Coupe vs. 2005 Opel Astra
To start off, 2005 Opel Astra is newer by 30 year(s). Which means there will be less support and parts availability for 1975 Mazda RX 4 Coupe. In addition, the cost of maintenance, including insurance, on 1975 Mazda RX 4 Coupe would be higher. At 2,616 cc (2 cylinders), 1975 Mazda RX 4 Coupe is equipped with a bigger engine. In terms of performance, 2005 Opel Astra (123 HP @ 5600 RPM) has 9 more horse power than 1975 Mazda RX 4 Coupe. (114 HP @ 6000 RPM) In normal driving conditions, 2005 Opel Astra should accelerate faster than 1975 Mazda RX 4 Coupe. With that said, vehicle weight also plays an important factor in acceleration. 2005 Opel Astra weights approximately 90 kg more than 1975 Mazda RX 4 Coupe. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Opel Astra (167 Nm @ 3800 RPM) has 2 more torque (in Nm) than 1975 Mazda RX 4 Coupe. (165 Nm @ 4000 RPM). This means 2005 Opel Astra will have an easier job in driving up hills or pulling heavy equipment than 1975 Mazda RX 4 Coupe.
Compare all specifications:
| 1975 Mazda RX 4 Coupe | 2005 Opel Astra | |
| Make | Mazda | Opel |
| Model | RX 4 Coupe | Astra |
| Year Released | 1975 | 2005 |
| Engine Position | Front | Front |
| Engine Size | 2616 cc | 1796 cc |
| Engine Cylinders | 2 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 114 HP | 123 HP |
| Engine RPM | 6000 RPM | 5600 RPM |
| Torque | 165 Nm | 167 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1110 kg | 1200 kg |
| Wheelbase Size | 2520 mm | 2740 mm |
