1973 Fiat 128 vs. 1981 Pontiac Firebird
To start off, 1981 Pontiac Firebird is newer by 8 year(s). Which means there will be less support and parts availability for 1973 Fiat 128. In addition, the cost of maintenance, including insurance, on 1973 Fiat 128 would be higher. At 5,012 cc (8 cylinders), 1981 Pontiac Firebird is equipped with a bigger engine. In terms of performance, 1981 Pontiac Firebird (145 HP @ 3800 RPM) has 82 more horse power than 1973 Fiat 128. (63 HP @ 6000 RPM) In normal driving conditions, 1981 Pontiac Firebird should accelerate faster than 1973 Fiat 128. With that said, vehicle weight also plays an important factor in acceleration. 1981 Pontiac Firebird weights approximately 722 kg more than 1973 Fiat 128. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1981 Pontiac Firebird (324 Nm @ 2400 RPM) has 241 more torque (in Nm) than 1973 Fiat 128. (83 Nm @ 4400 RPM). This means 1981 Pontiac Firebird will have an easier job in driving up hills or pulling heavy equipment than 1973 Fiat 128.
Compare all specifications:
| 1973 Fiat 128 | 1981 Pontiac Firebird | |
| Make | Fiat | Pontiac |
| Model | 128 | Firebird |
| Year Released | 1973 | 1981 |
| Engine Position | Front | Front |
| Engine Size | 1116 cc | 5012 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 63 HP | 145 HP |
| Engine RPM | 6000 RPM | 3800 RPM |
| Torque | 83 Nm | 324 Nm |
| Torque RPM | 4400 RPM | 2400 RPM |
| Engine Bore Size | 80 mm | 95 mm |
| Engine Stroke Size | 55.5 mm | 88.4 mm |
| Engine Compression Ratio | 8.8:1 | 8.6:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 820 kg | 1542 kg |
| Vehicle Length | 3820 mm | 5040 mm |
| Vehicle Width | 1570 mm | 1860 mm |
| Vehicle Height | 1320 mm | 1260 mm |
| Wheelbase Size | 2230 mm | 2750 mm |
| Fuel Tank Capacity | 50 L | 79 L |
