1975 AC 428 vs. 1979 Mazda 121
To start off, 1979 Mazda 121 is newer by 4 year(s). Which means there will be less support and parts availability for 1975 AC 428. In addition, the cost of maintenance, including insurance, on 1975 AC 428 would be higher. At 7,003 cc (8 cylinders), 1975 AC 428 is equipped with a bigger engine. In terms of performance, 1975 AC 428 (298 HP @ 4600 RPM) has 208 more horse power than 1979 Mazda 121. (90 HP @ 4800 RPM). In normal driving conditions, 1975 AC 428 should accelerate faster than 1979 Mazda 121. With that said, vehicle weight also plays an important factor in acceleration. 1975 AC 428 weights approximately 296 kg more than 1979 Mazda 121. 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, 1975 AC 428 (639 Nm @ 2800 RPM) has 479 more torque (in Nm) than 1979 Mazda 121. (160 Nm @ 3000 RPM). This means 1975 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1979 Mazda 121.
Compare all specifications:
| 1975 AC 428 | 1979 Mazda 121 | |
| Make | AC | Mazda |
| Model | 428 | 121 |
| Year Released | 1975 | 1979 |
| Engine Position | Front | Front |
| Engine Size | 7003 cc | 1970 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 298 HP | 90 HP |
| Engine RPM | 4600 RPM | 4800 RPM |
| Torque | 639 Nm | 160 Nm |
| Torque RPM | 2800 RPM | 3000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 4 seats |
| Vehicle Weight | 1430 kg | 1134 kg |
| Vehicle Length | 4430 mm | 4510 mm |
| Vehicle Width | 1710 mm | 1690 mm |
| Vehicle Height | 1310 mm | 1350 mm |
| Wheelbase Size | 2450 mm | 2520 mm |
