1956 Armstrong Siddeley Sapphire vs. 1958 Jaguar XK
To start off, 1958 Jaguar XK is newer by 2 year(s). Which means there will be less support and parts availability for 1956 Armstrong Siddeley Sapphire. In addition, the cost of maintenance, including insurance, on 1956 Armstrong Siddeley Sapphire would be higher. At 3,442 cc (6 cylinders), 1958 Jaguar XK is equipped with a bigger engine. In terms of performance, 1958 Jaguar XK (208 HP @ 5500 RPM) has 123 more horse power than 1956 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM) In normal driving conditions, 1958 Jaguar XK should accelerate faster than 1956 Armstrong Siddeley Sapphire. With that said, vehicle weight also plays an important factor in acceleration. 1958 Jaguar XK weights approximately 116 kg more than 1956 Armstrong Siddeley Sapphire. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 1958 Jaguar XK (310 Nm @ 2500 RPM) has 150 more torque (in Nm) than 1956 Armstrong Siddeley Sapphire. (160 Nm @ 1750 RPM). This means 1958 Jaguar XK will have an easier job in driving up hills or pulling heavy equipment than 1956 Armstrong Siddeley Sapphire.
Compare all specifications:
| 1956 Armstrong Siddeley Sapphire | 1958 Jaguar XK | |
| Make | Armstrong Siddeley | Jaguar |
| Model | Sapphire | XK |
| Year Released | 1956 | 1958 |
| Engine Position | Front | Front |
| Engine Size | 2307 cc | 3442 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 85 HP | 208 HP |
| Engine RPM | 4400 RPM | 5500 RPM |
| Torque | 160 Nm | 310 Nm |
| Torque RPM | 1750 RPM | 2500 RPM |
| Engine Bore Size | 70 mm | 83 mm |
| Engine Stroke Size | 100 mm | 106 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1360 kg | 1476 kg |
| Vehicle Length | 4580 mm | 4480 mm |
| Vehicle Width | 1730 mm | 1640 mm |
| Vehicle Height | 1570 mm | 1400 mm |
| Wheelbase Size | 2900 mm | 2730 mm |
