1955 Fairthorpe Atom vs. 1991 Ford Sierra
To start off, 1991 Ford Sierra is newer by 36 year(s). Which means there will be less support and parts availability for 1955 Fairthorpe Atom. In addition, the cost of maintenance, including insurance, on 1955 Fairthorpe Atom would be higher. At 1,751 cc (4 cylinders), 1991 Ford Sierra is equipped with a bigger engine. In terms of performance, 1991 Ford Sierra (75 HP @ 4500 RPM) has 40 more horse power than 1955 Fairthorpe Atom. (35 HP @ 5700 RPM) In normal driving conditions, 1991 Ford Sierra should accelerate faster than 1955 Fairthorpe Atom. With that said, vehicle weight also plays an important factor in acceleration. 1991 Ford Sierra weights approximately 714 kg more than 1955 Fairthorpe Atom. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1991 Ford Sierra (152 Nm @ 2200 RPM) has 103 more torque (in Nm) than 1955 Fairthorpe Atom. (49 Nm @ 3750 RPM). This means 1991 Ford Sierra will have an easier job in driving up hills or pulling heavy equipment than 1955 Fairthorpe Atom.
Compare all specifications:
| 1955 Fairthorpe Atom | 1991 Ford Sierra | |
| Make | Fairthorpe | Ford |
| Model | Atom | Sierra |
| Year Released | 1955 | 1991 |
| Engine Position | Rear | Front |
| Engine Size | 646 cc | 1751 cc |
| Engine Cylinders | 2 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 35 HP | 75 HP |
| Engine RPM | 5700 RPM | 4500 RPM |
| Torque | 49 Nm | 152 Nm |
| Torque RPM | 3750 RPM | 2200 RPM |
| Engine Compression Ratio | 6.5:1 | 21.5:1 |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 431 kg | 1145 kg |
| Vehicle Length | 3660 mm | 4430 mm |
| Vehicle Width | 1530 mm | 1700 mm |
| Vehicle Height | 1380 mm | 1370 mm |
| Wheelbase Size | 2270 mm | 2620 mm |
| Fuel Tank Capacity | 20 L | 60 L |
