1984 Ford Sierra vs. 1978 Mazda 121
To start off, 1984 Ford Sierra is newer by 6 year(s). Which means there will be less support and parts availability for 1978 Mazda 121. In addition, the cost of maintenance, including insurance, on 1978 Mazda 121 would be higher. At 1,970 cc (4 cylinders), 1978 Mazda 121 is equipped with a bigger engine. In terms of performance, 1978 Mazda 121 (86 HP @ 4800 RPM) has 11 more horse power than 1984 Ford Sierra. (75 HP @ 5300 RPM) In normal driving conditions, 1978 Mazda 121 should accelerate faster than 1984 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1978 Mazda 121 weights approximately 90 kg more than 1984 Ford Sierra. 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, 1978 Mazda 121 (160 Nm @ 3000 RPM) has 41 more torque (in Nm) than 1984 Ford Sierra. (119 Nm @ 2900 RPM). This means 1978 Mazda 121 will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra.
Compare all specifications:
| 1984 Ford Sierra | 1978 Mazda 121 | |
| Make | Ford | Mazda |
| Model | Sierra | 121 |
| Year Released | 1984 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 1608 cc | 1970 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 86 HP |
| Engine RPM | 5300 RPM | 4800 RPM |
| Torque | 119 Nm | 160 Nm |
| Torque RPM | 2900 RPM | 3000 RPM |
| Engine Compression Ratio | 9.2:1 | 8.6:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Weight | 1040 kg | 1130 kg |
| Vehicle Length | 4500 mm | 4510 mm |
| Vehicle Width | 1720 mm | 1690 mm |
| Vehicle Height | 1450 mm | 1350 mm |
| Wheelbase Size | 2610 mm | 2520 mm |
