2005 GMC Sierra vs. 1975 Pontiac Firebird
To start off, 2005 GMC Sierra is newer by 30 year(s). Which means there will be less support and parts availability for 1975 Pontiac Firebird. In addition, the cost of maintenance, including insurance, on 1975 Pontiac Firebird would be higher. At 5,965 cc (8 cylinders), 2005 GMC Sierra is equipped with a bigger engine. In terms of performance, 2005 GMC Sierra (321 HP @ 5000 RPM) has 213 more horse power than 1975 Pontiac Firebird. (108 HP @ 3600 RPM). In normal driving conditions, 2005 GMC Sierra should accelerate faster than 1975 Pontiac Firebird. With that said, vehicle weight also plays an important factor in acceleration. 2005 GMC Sierra weights approximately 800 kg more than 1975 Pontiac Firebird. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 1975 Pontiac Firebird. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 GMC Sierra (370 Nm @ 4000 RPM) has 133 more torque (in Nm) than 1975 Pontiac Firebird. (237 Nm @ 1600 RPM). This means 2005 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1975 Pontiac Firebird.
Compare all specifications:
| 2005 GMC Sierra | 1975 Pontiac Firebird | |
| Make | GMC | Pontiac |
| Model | Sierra | Firebird |
| Year Released | 2005 | 1975 |
| Body Type | Pickup | Coupe |
| Engine Position | Front | Front |
| Engine Size | 5965 cc | 4093 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 321 HP | 108 HP |
| Engine RPM | 5000 RPM | 3600 RPM |
| Torque | 370 Nm | 237 Nm |
| Torque RPM | 4000 RPM | 1600 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 6 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 2270 kg | 1470 kg |
| Vehicle Length | 5790 mm | 4880 mm |
| Vehicle Width | 2000 mm | 1870 mm |
| Vehicle Height | 1850 mm | 1290 mm |
| Wheelbase Size | 3650 mm | 2750 mm |
