1958 AC Ace vs. 1956 Armstrong Siddeley Sapphire
To start off, 1958 AC Ace 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 2,307 cc (6 cylinders), 1956 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 1958 AC Ace (125 HP @ 6000 RPM) has 40 more horse power than 1956 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM). In normal driving conditions, 1958 AC Ace should accelerate faster than 1956 Armstrong Siddeley Sapphire. With that said, vehicle weight also plays an important factor in acceleration. 1956 Armstrong Siddeley Sapphire weights approximately 464 kg more than 1958 AC Ace.
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 AC Ace (167 Nm @ 4500 RPM) has 7 more torque (in Nm) than 1956 Armstrong Siddeley Sapphire. (160 Nm @ 1750 RPM). This means 1958 AC Ace will have an easier job in driving up hills or pulling heavy equipment than 1956 Armstrong Siddeley Sapphire.
Compare all specifications:
| 1958 AC Ace | 1956 Armstrong Siddeley Sapphire | |
| Make | AC | Armstrong Siddeley |
| Model | Ace | Sapphire |
| Year Released | 1958 | 1956 |
| Body Type | Roadster | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1969 cc | 2307 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 125 HP | 85 HP |
| Engine RPM | 6000 RPM | 4400 RPM |
| Torque | 167 Nm | 160 Nm |
| Torque RPM | 4500 RPM | 1750 RPM |
| Engine Bore Size | 66 mm | 70 mm |
| Engine Stroke Size | 96 mm | 100 mm |
| Engine Compression Ratio | 9.0:1 | 7.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 896 kg | 1360 kg |
| Vehicle Length | 4010 mm | 4580 mm |
| Vehicle Width | 1540 mm | 1730 mm |
| Vehicle Height | 1270 mm | 1570 mm |
| Wheelbase Size | 2290 mm | 2900 mm |
