2003 GMC Envoy vs. 1981 Pontiac Firebird
To start off, 2003 GMC Envoy is newer by 22 year(s). Which means there will be less support and parts availability for 1981 Pontiac Firebird. In addition, the cost of maintenance, including insurance, on 1981 Pontiac Firebird would be higher. At 4,158 cc (6 cylinders), 2003 GMC Envoy is equipped with a bigger engine. In terms of performance, 2003 GMC Envoy (271 HP @ 6000 RPM) has 161 more horse power than 1981 Pontiac Firebird. (110 HP @ 3800 RPM). In normal driving conditions, 2003 GMC Envoy should accelerate faster than 1981 Pontiac Firebird. With that said, vehicle weight also plays an important factor in acceleration. 2003 GMC Envoy weights approximately 405 kg more than 1981 Pontiac Firebird. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 GMC Envoy is four wheel drive (4WD), it will have significant more traction and grip than 1981 Pontiac Firebird. In wet, icy, snow, or gravel driving conditions, 2003 GMC Envoy 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, 2003 GMC Envoy (373 Nm @ 3600 RPM) has 117 more torque (in Nm) than 1981 Pontiac Firebird. (256 Nm @ 1600 RPM). This means 2003 GMC Envoy will have an easier job in driving up hills or pulling heavy equipment than 1981 Pontiac Firebird.
Compare all specifications:
| 2003 GMC Envoy | 1981 Pontiac Firebird | |
| Make | GMC | Pontiac |
| Model | Envoy | Firebird |
| Year Released | 2003 | 1981 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4158 cc | 3790 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 271 HP | 110 HP |
| Engine RPM | 6000 RPM | 3800 RPM |
| Torque | 373 Nm | 256 Nm |
| Torque RPM | 3600 RPM | 1600 RPM |
| Engine Bore Size | 93 mm | 96.5 mm |
| Engine Stroke Size | 102 mm | 86.4 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 2010 kg | 1605 kg |
| Vehicle Length | 4870 mm | 5040 mm |
| Vehicle Width | 1840 mm | 1860 mm |
| Vehicle Height | 1780 mm | 1260 mm |
| Wheelbase Size | 2880 mm | 2750 mm |
| Fuel Tank Capacity | 83 L | 79 L |
