1975 Mazda RX 4 Coupe vs. 1978 Opel Kadett
To start off, 1978 Opel Kadett is newer by 3 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, 1975 Mazda RX 4 Coupe (114 HP @ 6000 RPM) has 67 more horse power than 1978 Opel Kadett. (47 HP @ 5600 RPM). In normal driving conditions, 1975 Mazda RX 4 Coupe should accelerate faster than 1978 Opel Kadett. With that said, vehicle weight also plays an important factor in acceleration. 1975 Mazda RX 4 Coupe weights approximately 290 kg more than 1978 Opel Kadett. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1975 Mazda RX 4 Coupe (165 Nm @ 4000 RPM) has 94 more torque (in Nm) than 1978 Opel Kadett. (71 Nm @ 3400 RPM). This means 1975 Mazda RX 4 Coupe will have an easier job in driving up hills or pulling heavy equipment than 1978 Opel Kadett.
Compare all specifications:
| 1975 Mazda RX 4 Coupe | 1978 Opel Kadett | |
| Make | Mazda | Opel |
| Model | RX 4 Coupe | Kadett |
| Year Released | 1975 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 2616 cc | 992 cc |
| Engine Cylinders | 2 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 114 HP | 47 HP |
| Engine RPM | 6000 RPM | 5600 RPM |
| Torque | 165 Nm | 71 Nm |
| Torque RPM | 4000 RPM | 3400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1110 kg | 820 kg |
| Vehicle Length | 4400 mm | 3900 mm |
| Vehicle Width | 1670 mm | 1590 mm |
| Vehicle Height | 1390 mm | 1320 mm |
| Wheelbase Size | 2520 mm | 2520 mm |
