1991 Mazda RX-7 vs. 1978 Mazda 616
To start off, 1991 Mazda RX-7 is newer by 13 year(s). Which means there will be less support and parts availability for 1978 Mazda 616. In addition, the cost of maintenance, including insurance, on 1978 Mazda 616 would be higher. At 2,616 cc, 1991 Mazda RX-7 is equipped with a bigger engine. In terms of performance, 1991 Mazda RX-7 (197 HP @ 6500 RPM) has 118 more horse power than 1978 Mazda 616. (79 HP @ 5500 RPM). In normal driving conditions, 1991 Mazda RX-7 should accelerate faster than 1978 Mazda 616. With that said, vehicle weight also plays an important factor in acceleration. 1991 Mazda RX-7 weights approximately 388 kg more than 1978 Mazda 616. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1991 Mazda RX-7 (271 Nm @ 3500 RPM) has 147 more torque (in Nm) than 1978 Mazda 616. (124 Nm @ 3500 RPM). This means 1991 Mazda RX-7 will have an easier job in driving up hills or pulling heavy equipment than 1978 Mazda 616.
Compare all specifications:
| 1991 Mazda RX-7 | 1978 Mazda 616 | |
| Make | Mazda | Mazda |
| Model | RX-7 | 616 |
| Year Released | 1991 | 1978 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2616 cc | 1586 cc |
| Engine Type | dual-disk rotary | in-line |
| Horse Power | 197 HP | 79 HP |
| Engine RPM | 6500 RPM | 5500 RPM |
| Torque | 271 Nm | 124 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 5 seats |
| Vehicle Weight | 1300 kg | 912 kg |
| Vehicle Length | 4320 mm | 4160 mm |
| Vehicle Width | 1700 mm | 1590 mm |
| Vehicle Height | 1270 mm | 1400 mm |
| Wheelbase Size | 2440 mm | 2480 mm |
