1986 Ford Sierra vs. 1973 Pontiac Firebird
To start off, 1986 Ford Sierra is newer by 13 year(s). Which means there will be less support and parts availability for 1973 Pontiac Firebird. In addition, the cost of maintenance, including insurance, on 1973 Pontiac Firebird would be higher. At 6,547 cc (8 cylinders), 1973 Pontiac Firebird is equipped with a bigger engine. In terms of performance, 1973 Pontiac Firebird (285 HP @ 4400 RPM) has 83 more horse power than 1986 Ford Sierra. (202 HP @ 6000 RPM) In normal driving conditions, 1973 Pontiac Firebird should accelerate faster than 1986 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1973 Pontiac Firebird weights approximately 416 kg more than 1986 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 1973 Pontiac Firebird (421 Nm @ 2400 RPM) has 144 more torque (in Nm) than 1986 Ford Sierra. (277 Nm @ 4500 RPM). This means 1973 Pontiac Firebird will have an easier job in driving up hills or pulling heavy equipment than 1986 Ford Sierra.
Compare all specifications:
| 1986 Ford Sierra | 1973 Pontiac Firebird | |
| Make | Ford | Pontiac |
| Model | Sierra | Firebird |
| Year Released | 1986 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 1993 cc | 6547 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 202 HP | 285 HP |
| Engine RPM | 6000 RPM | 4400 RPM |
| Torque | 277 Nm | 421 Nm |
| Torque RPM | 4500 RPM | 2400 RPM |
| Engine Bore Size | 90.8 mm | 104.7 mm |
| Engine Stroke Size | 77 mm | 95.3 mm |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 3 doors | 2 doors |
| Vehicle Weight | 1180 kg | 1596 kg |
| Vehicle Length | 4430 mm | 4880 mm |
| Vehicle Width | 1730 mm | 1870 mm |
| Vehicle Height | 1430 mm | 1290 mm |
| Wheelbase Size | 2610 mm | 2750 mm |
| Fuel Tank Capacity | 116 L | 76 L |
