1999 GMC Sierra vs. 1977 Mazda 121
To start off, 1999 GMC Sierra is newer by 22 year(s). Which means there will be less support and parts availability for 1977 Mazda 121. In addition, the cost of maintenance, including insurance, on 1977 Mazda 121 would be higher. At 4,293 cc (6 cylinders), 1999 GMC Sierra is equipped with a bigger engine. In terms of performance, 1999 GMC Sierra (197 HP @ 4600 RPM) has 83 more horse power than 1977 Mazda 121. (114 HP @ 6000 RPM). In normal driving conditions, 1999 GMC Sierra should accelerate faster than 1977 Mazda 121. With that said, vehicle weight also plays an important factor in acceleration. 1999 GMC Sierra weights approximately 575 kg more than 1977 Mazda 121. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1999 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 1977 Mazda 121. In wet, icy, snow, or gravel driving conditions, 1999 GMC Sierra 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, 1999 GMC Sierra (352 Nm @ 2800 RPM) has 187 more torque (in Nm) than 1977 Mazda 121. (165 Nm @ 4000 RPM). This means 1999 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1977 Mazda 121.
Compare all specifications:
| 1999 GMC Sierra | 1977 Mazda 121 | |
| Make | GMC | Mazda |
| Model | Sierra | 121 |
| Year Released | 1999 | 1977 |
| Engine Position | Front | Front |
| Engine Size | 4293 cc | 2615 cc |
| Engine Cylinders | 6 cylinders | 2 cylinders |
| Engine Type | V | in-line |
| Horse Power | 197 HP | 114 HP |
| Engine RPM | 4600 RPM | 6000 RPM |
| Torque | 352 Nm | 165 Nm |
| Torque RPM | 2800 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Vehicle Weight | 1775 kg | 1200 kg |
| Vehicle Length | 5170 mm | 4510 mm |
| Vehicle Width | 2000 mm | 1690 mm |
| Vehicle Height | 1810 mm | 1350 mm |
| Wheelbase Size | 3030 mm | 2520 mm |
