1991 Chevrolet Astro vs. 1979 Mazda 121
To start off, 1991 Chevrolet Astro is newer by 12 year(s). Which means there will be less support and parts availability for 1979 Mazda 121. In addition, the cost of maintenance, including insurance, on 1979 Mazda 121 would be higher. At 4,293 cc (6 cylinders), 1991 Chevrolet Astro is equipped with a bigger engine. In terms of performance, 1991 Chevrolet Astro (183 HP @ 4400 RPM) has 93 more horse power than 1979 Mazda 121. (90 HP @ 4800 RPM). In normal driving conditions, 1991 Chevrolet Astro should accelerate faster than 1979 Mazda 121. With that said, vehicle weight also plays an important factor in acceleration. 1991 Chevrolet Astro weights approximately 762 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.
Because 1991 Chevrolet Astro is four wheel drive (4WD), it will have significant more traction and grip than 1979 Mazda 121. In wet, icy, snow, or gravel driving conditions, 1991 Chevrolet Astro will offer significantly more control. 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, 1991 Chevrolet Astro (338 Nm @ 2800 RPM) has 178 more torque (in Nm) than 1979 Mazda 121. (160 Nm @ 3000 RPM). This means 1991 Chevrolet Astro will have an easier job in driving up hills or pulling heavy equipment than 1979 Mazda 121.
Compare all specifications:
| 1991 Chevrolet Astro | 1979 Mazda 121 | |
| Make | Chevrolet | Mazda |
| Model | Astro | 121 |
| Year Released | 1991 | 1979 |
| Engine Position | Front | Front |
| Engine Size | 4293 cc | 1970 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 183 HP | 90 HP |
| Engine RPM | 4400 RPM | 4800 RPM |
| Torque | 338 Nm | 160 Nm |
| Torque RPM | 2800 RPM | 3000 RPM |
| Engine Bore Size | 101.6 mm | 80 mm |
| Engine Stroke Size | 88.4 mm | 98 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 8 seats | 4 seats |
| Vehicle Weight | 1896 kg | 1134 kg |
| Vehicle Length | 4830 mm | 4510 mm |
| Vehicle Width | 1980 mm | 1690 mm |
| Vehicle Height | 1910 mm | 1350 mm |
| Wheelbase Size | 2830 mm | 2520 mm |
