1999 GMC Sierra vs. 1973 Mazda RX-4
To start off, 1999 GMC Sierra is newer by 26 year(s). Which means there will be less support and parts availability for 1973 Mazda RX-4. In addition, the cost of maintenance, including insurance, on 1973 Mazda RX-4 would be higher. At 4,784 cc (6 cylinders), 1999 GMC Sierra is equipped with a bigger engine. In terms of performance, 1999 GMC Sierra (267 HP @ 5200 RPM) has 153 more horse power than 1973 Mazda RX-4. (114 HP @ 6000 RPM). In normal driving conditions, 1999 GMC Sierra should accelerate faster than 1973 Mazda RX-4. With that said, vehicle weight also plays an important factor in acceleration. 1999 GMC Sierra weights approximately 695 kg more than 1973 Mazda RX-4. 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 1973 Mazda RX-4. 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 (386 Nm @ 4000 RPM) has 221 more torque (in Nm) than 1973 Mazda RX-4. (165 Nm @ 4000 RPM). This means 1999 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1973 Mazda RX-4.
Compare all specifications:
| 1999 GMC Sierra | 1973 Mazda RX-4 | |
| Make | GMC | Mazda |
| Model | Sierra | RX-4 |
| Year Released | 1999 | 1973 |
| Body Type | Pickup | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4784 cc | 2616 cc |
| Engine Type | in-line | dual-disk rotary |
| Horse Power | 267 HP | 114 HP |
| Engine RPM | 5200 RPM | 6000 RPM |
| Torque | 386 Nm | 165 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Vehicle Weight | 1805 kg | 1110 kg |
| Vehicle Length | 5170 mm | 4400 mm |
| Vehicle Width | 2000 mm | 1670 mm |
| Vehicle Height | 1810 mm | 1390 mm |
| Wheelbase Size | 3030 mm | 2520 mm |
