1956 Cadillac 6239D vs. 1981 Mazda RX-7
To start off, 1981 Mazda RX-7 is newer by 25 year(s). Which means there will be less support and parts availability for 1956 Cadillac 6239D. In addition, the cost of maintenance, including insurance, on 1956 Cadillac 6239D would be higher. At 5,972 cc (8 cylinders), 1956 Cadillac 6239D is equipped with a bigger engine. In terms of performance, 1956 Cadillac 6239D (285 HP @ 4600 RPM) has 181 more horse power than 1981 Mazda RX-7. (104 HP @ 6000 RPM). In normal driving conditions, 1956 Cadillac 6239D should accelerate faster than 1981 Mazda RX-7. With that said, vehicle weight also plays an important factor in acceleration. 1956 Cadillac 6239D weights approximately 950 kg more than 1981 Mazda RX-7. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 1956 Cadillac 6239D (543 Nm @ 2800 RPM) has 398 more torque (in Nm) than 1981 Mazda RX-7. (145 Nm @ 4000 RPM). This means 1956 Cadillac 6239D will have an easier job in driving up hills or pulling heavy equipment than 1981 Mazda RX-7. 1956 Cadillac 6239D has automatic transmission and 1981 Mazda RX-7 has manual transmission. 1981 Mazda RX-7 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 1956 Cadillac 6239D will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1956 Cadillac 6239D | 1981 Mazda RX-7 | |
| Make | Cadillac | Mazda |
| Model | 6239D | RX-7 |
| Year Released | 1956 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 5972 cc | 2292 cc |
| Engine Type | V | dual-disk rotary |
| Horse Power | 285 HP | 104 HP |
| Engine RPM | 4600 RPM | 6000 RPM |
| Torque | 543 Nm | 145 Nm |
| Torque RPM | 2800 RPM | 4000 RPM |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 2010 kg | 1060 kg |
| Vehicle Length | 5650 mm | 4300 mm |
| Vehicle Width | 2040 mm | 1680 mm |
| Vehicle Height | 1520 mm | 1280 mm |
| Wheelbase Size | 3280 mm | 2430 mm |
| Fuel Tank Capacity | 75 L | 65 L |
