1957 Armstrong Siddeley Sapphire vs. 1949 Rover P4
To start off, 1957 Armstrong Siddeley Sapphire is newer by 8 year(s). Which means there will be less support and parts availability for 1949 Rover P4. In addition, the cost of maintenance, including insurance, on 1949 Rover P4 would be higher. At 2,309 cc (6 cylinders), 1957 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 1957 Armstrong Siddeley Sapphire (85 HP @ 4400 RPM) has 11 more horse power than 1949 Rover P4. (74 HP @ 4200 RPM). In normal driving conditions, 1957 Armstrong Siddeley Sapphire should accelerate faster than 1949 Rover P4. With that said, vehicle weight also plays an important factor in acceleration. 1949 Rover P4 weights approximately 91 kg more than 1957 Armstrong Siddeley Sapphire.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 Armstrong Siddeley Sapphire (161 Nm @ 1750 RPM) has 11 more torque (in Nm) than 1949 Rover P4. (150 Nm @ 2500 RPM). This means 1957 Armstrong Siddeley Sapphire will have an easier job in driving up hills or pulling heavy equipment than 1949 Rover P4.
Compare all specifications:
| 1957 Armstrong Siddeley Sapphire | 1949 Rover P4 | |
| Make | Armstrong Siddeley | Rover |
| Model | Sapphire | P4 |
| Year Released | 1957 | 1949 |
| Engine Position | Front | Front |
| Engine Size | 2309 cc | 2102 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 85 HP | 74 HP |
| Engine RPM | 4400 RPM | 4200 RPM |
| Torque | 161 Nm | 150 Nm |
| Torque RPM | 1750 RPM | 2500 RPM |
| Engine Bore Size | 70 mm | 65.2 mm |
| Engine Stroke Size | 100 mm | 105 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1360 kg | 1451 kg |
| Vehicle Length | 4580 mm | 4590 mm |
| Vehicle Width | 1750 mm | 1680 mm |
| Vehicle Height | 1570 mm | 1620 mm |
| Wheelbase Size | 2900 mm | 2830 mm |
| Fuel Tank Capacity | 72 L | 52 L |
