1985 Ford Sierra vs. 1985 Mazda RX-7
To start off, both 1985 Ford Sierra and 1985 Mazda RX-7 were released in the same year (1985). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,790 cc (6 cylinders), 1985 Ford Sierra is equipped with a bigger engine. In terms of performance, 1985 Ford Sierra (148 HP @ 5700 RPM) has 44 more horse power than 1985 Mazda RX-7. (104 HP @ 6000 RPM). In normal driving conditions, 1985 Ford Sierra should accelerate faster than 1985 Mazda RX-7. With that said, vehicle weight also plays an important factor in acceleration. 1985 Ford Sierra weights approximately 145 kg more than 1985 Mazda RX-7. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1985 Ford Sierra (220 Nm @ 3800 RPM) has 75 more torque (in Nm) than 1985 Mazda RX-7. (145 Nm @ 4000 RPM). This means 1985 Ford Sierra will have an easier job in driving up hills or pulling heavy equipment than 1985 Mazda RX-7.
Compare all specifications:
| 1985 Ford Sierra | 1985 Mazda RX-7 | |
| Make | Ford | Mazda |
| Model | Sierra | RX-7 |
| Year Released | 1985 | 1985 |
| Engine Position | Front | Front |
| Engine Size | 2790 cc | 2292 cc |
| Engine Type | in-line | dual-disk rotary |
| Horse Power | 148 HP | 104 HP |
| Engine RPM | 5700 RPM | 6000 RPM |
| Torque | 220 Nm | 145 Nm |
| Torque RPM | 3800 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 1205 kg | 1060 kg |
| Vehicle Length | 4400 mm | 4290 mm |
| Vehicle Width | 1680 mm | 1680 mm |
| Vehicle Height | 1370 mm | 1270 mm |
| Wheelbase Size | 2620 mm | 2430 mm |
