1991 Ford Sierra vs. 1959 Rover P5
To start off, 1991 Ford Sierra is newer by 32 year(s). Which means there will be less support and parts availability for 1959 Rover P5. In addition, the cost of maintenance, including insurance, on 1959 Rover P5 would be higher. At 2,995 cc (6 cylinders), 1959 Rover P5 is equipped with a bigger engine. In terms of performance, 1959 Rover P5 (106 HP @ 4500 RPM) has 31 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 1959 Rover P5 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1959 Rover P5 weights approximately 439 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, 1959 Rover P5 (222 Nm @ 1500 RPM) has 70 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 1959 Rover P5 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 1959 Rover P5 | |
| Make | Ford | Rover |
| Model | Sierra | P5 |
| Year Released | 1991 | 1959 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 2995 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 106 HP |
| Engine RPM | 4500 RPM | 4500 RPM |
| Torque | 152 Nm | 222 Nm |
| Torque RPM | 2200 RPM | 1500 RPM |
| Engine Bore Size | 82.5 mm | 77.8 mm |
| Engine Stroke Size | 82 mm | 105 mm |
| Engine Compression Ratio | 21.5:1 | 8.8:1 |
| Fuel Type | Diesel | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1145 kg | 1584 kg |
| Vehicle Length | 4430 mm | 4750 mm |
| Vehicle Width | 1700 mm | 1790 mm |
| Vehicle Height | 1370 mm | 1540 mm |
| Wheelbase Size | 2620 mm | 2820 mm |
| Fuel Tank Capacity | 60 L | 63 L |
