1991 Rover 100 vs. 1957 Rover P4
To start off, 1991 Rover 100 is newer by 34 year(s). Which means there will be less support and parts availability for 1957 Rover P4. In addition, the cost of maintenance, including insurance, on 1957 Rover P4 would be higher. At 1,997 cc (4 cylinders), 1957 Rover P4 is equipped with a bigger engine. In terms of performance, 1991 Rover 100 (102 HP @ 6000 RPM) has 51 more horse power than 1957 Rover P4. (51 HP @ 4000 RPM). In normal driving conditions, 1991 Rover 100 should accelerate faster than 1957 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1957 Rover P4 weights approximately 510 kg more than 1991 Rover 100.
Let's talk about torque, 1957 Rover P4 (138 Nm @ 2000 RPM) has 3 more torque (in Nm) than 1991 Rover 100. (135 Nm @ 5000 RPM). This means 1957 Rover P4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rover 100.
Compare all specifications:
| 1991 Rover 100 | 1957 Rover P4 | |
| Make | Rover | Rover |
| Model | 100 | P4 |
| Year Released | 1991 | 1957 |
| Engine Position | Front | Front |
| Engine Size | 1396 cc | 1997 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 102 HP | 51 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 135 Nm | 138 Nm |
| Torque RPM | 5000 RPM | 2000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 870 kg | 1380 kg |
| Vehicle Length | 3530 mm | 4550 mm |
| Vehicle Width | 1570 mm | 1680 mm |
| Vehicle Height | 1380 mm | 1620 mm |
