1999 GMC Sierra vs. 1978 Holden Sunbird
To start off, 1999 GMC Sierra is newer by 21 year(s). Which means there will be less support and parts availability for 1978 Holden Sunbird. In addition, the cost of maintenance, including insurance, on 1978 Holden Sunbird 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 171 more horse power than 1978 Holden Sunbird. (96 HP @ 5200 RPM). In normal driving conditions, 1999 GMC Sierra should accelerate faster than 1978 Holden Sunbird. With that said, vehicle weight also plays an important factor in acceleration. 1999 GMC Sierra weights approximately 645 kg more than 1978 Holden Sunbird. 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 1978 Holden Sunbird. 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 229 more torque (in Nm) than 1978 Holden Sunbird. (157 Nm @ 3600 RPM). This means 1999 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1978 Holden Sunbird.
Compare all specifications:
| 1999 GMC Sierra | 1978 Holden Sunbird | |
| Make | GMC | Holden |
| Model | Sierra | Sunbird |
| Year Released | 1999 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 4784 cc | 1897 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 267 HP | 96 HP |
| Engine RPM | 5200 RPM | 5200 RPM |
| Torque | 386 Nm | 157 Nm |
| Torque RPM | 4000 RPM | 3600 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Vehicle Weight | 1805 kg | 1160 kg |
| Vehicle Length | 5170 mm | 4500 mm |
| Vehicle Width | 2000 mm | 1710 mm |
| Vehicle Height | 1810 mm | 1340 mm |
| Wheelbase Size | 3030 mm | 2590 mm |
