2006 Kia Opirus vs. 1975 Mazda RX 4 Coupe
To start off, 2006 Kia Opirus is newer by 31 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 3,497 cc (6 cylinders), 2006 Kia Opirus is equipped with a bigger engine. In terms of performance, 2006 Kia Opirus (201 HP @ 5500 RPM) has 87 more horse power than 1975 Mazda RX 4 Coupe. (114 HP @ 6000 RPM). In normal driving conditions, 2006 Kia Opirus should accelerate faster than 1975 Mazda RX 4 Coupe. With that said, vehicle weight also plays an important factor in acceleration. 2006 Kia Opirus weights approximately 787 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, 2006 Kia Opirus (298 Nm @ 3500 RPM) has 133 more torque (in Nm) than 1975 Mazda RX 4 Coupe. (165 Nm @ 4000 RPM). This means 2006 Kia Opirus will have an easier job in driving up hills or pulling heavy equipment than 1975 Mazda RX 4 Coupe.
Compare all specifications:
| 2006 Kia Opirus | 1975 Mazda RX 4 Coupe | |
| Make | Kia | Mazda |
| Model | Opirus | RX 4 Coupe |
| Year Released | 2006 | 1975 |
| Engine Position | Front | Front |
| Engine Size | 3497 cc | 2616 cc |
| Engine Cylinders | 6 cylinders | 2 cylinders |
| Engine Type | V | in-line |
| Horse Power | 201 HP | 114 HP |
| Engine RPM | 5500 RPM | 6000 RPM |
| Torque | 298 Nm | 165 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Fuel Type | Gasoline - Premium | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1897 kg | 1110 kg |
| Vehicle Length | 4990 mm | 4400 mm |
| Vehicle Width | 1860 mm | 1670 mm |
| Vehicle Height | 1490 mm | 1390 mm |
| Wheelbase Size | 2810 mm | 2520 mm |
