1991 Ford Sierra vs. 1970 Pontiac GTO
To start off, 1991 Ford Sierra is newer by 21 year(s). Which means there will be less support and parts availability for 1970 Pontiac GTO. In addition, the cost of maintenance, including insurance, on 1970 Pontiac GTO would be higher. At 6,548 cc (8 cylinders), 1970 Pontiac GTO is equipped with a bigger engine. In terms of performance, 1970 Pontiac GTO (365 HP @ 5100 RPM) has 290 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 1970 Pontiac GTO should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1970 Pontiac GTO weights approximately 570 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1970 Pontiac GTO (603 Nm @ 3600 RPM) has 451 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1970 Pontiac GTO will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 1970 Pontiac GTO | |
| Make | Ford | Pontiac |
| Model | Sierra | GTO |
| Year Released | 1991 | 1970 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 6548 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 75 HP | 365 HP |
| Engine RPM | 4500 RPM | 5100 RPM |
| Torque | 152 Nm | 603 Nm |
| Torque RPM | 2200 RPM | 3600 RPM |
| Engine Bore Size | 82.5 mm | 104.6 mm |
| Engine Stroke Size | 82 mm | 95.3 mm |
| Engine Compression Ratio | 21.5:1 | 10.5:1 |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1145 kg | 1715 kg |
| Vehicle Length | 4430 mm | 5160 mm |
| Vehicle Width | 1700 mm | 1950 mm |
| Vehicle Height | 1370 mm | 1340 mm |
| Wheelbase Size | 2620 mm | 2850 mm |
| Fuel Tank Capacity | 60 L | 67 L |
