1957 Rover P4 vs. 1991 Rover 400
To start off, 1991 Rover 400 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 2,230 cc (6 cylinders), 1957 Rover P4 is equipped with a bigger engine. In terms of performance, 1991 Rover 400 (94 HP @ 6250 RPM) has 24 more horse power than 1957 Rover P4. (70 HP @ 4500 RPM) In normal driving conditions, 1991 Rover 400 should accelerate faster than 1957 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1957 Rover P4 weights approximately 380 kg more than 1991 Rover 400.
Because 1957 Rover P4 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1957 Rover P4. However, in wet, icy, snow, or gravel driving conditions, 1991 Rover 400, being front wheel drive (FWD), will offer much better control with better grip. 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, 1957 Rover P4 (153 Nm @ 1750 RPM) has 29 more torque (in Nm) than 1991 Rover 400. (124 Nm @ 4000 RPM). This means 1957 Rover P4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Rover 400.
Compare all specifications:
| 1957 Rover P4 | 1991 Rover 400 | |
| Make | Rover | Rover |
| Model | P4 | 400 |
| Year Released | 1957 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2230 cc | 1395 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 70 HP | 94 HP |
| Engine RPM | 4500 RPM | 6250 RPM |
| Torque | 153 Nm | 124 Nm |
| Torque RPM | 1750 RPM | 4000 RPM |
| Engine Bore Size | 73 mm | 75 mm |
| Engine Stroke Size | 88.9 mm | 79 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Weight | 1400 kg | 1020 kg |
| Vehicle Length | 4540 mm | 4370 mm |
| Vehicle Width | 1680 mm | 1690 mm |
| Vehicle Height | 1630 mm | 1410 mm |
| Wheelbase Size | 2830 mm | 2560 mm |
