1961 AC Ace vs. 1955 Armstrong Siddeley Sapphire
To start off, 1961 AC Ace is newer by 6 year(s). Which means there will be less support and parts availability for 1955 Armstrong Siddeley Sapphire. In addition, the cost of maintenance, including insurance, on 1955 Armstrong Siddeley Sapphire would be higher. At 2,553 cc (6 cylinders), 1961 AC Ace is equipped with a bigger engine. In terms of performance, 1961 AC Ace (100 HP @ 5500 RPM) has 15 more horse power than 1955 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM). In normal driving conditions, 1961 AC Ace should accelerate faster than 1955 Armstrong Siddeley Sapphire. With that said, vehicle weight also plays an important factor in acceleration. 1955 Armstrong Siddeley Sapphire weights approximately 547 kg more than 1961 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, 1961 AC Ace (180 Nm @ 2000 RPM) has 20 more torque (in Nm) than 1955 Armstrong Siddeley Sapphire. (160 Nm @ 1750 RPM). This means 1961 AC Ace will have an easier job in driving up hills or pulling heavy equipment than 1955 Armstrong Siddeley Sapphire.
Compare all specifications:
| 1961 AC Ace | 1955 Armstrong Siddeley Sapphire | |
| Make | AC | Armstrong Siddeley |
| Model | Ace | Sapphire |
| Year Released | 1961 | 1955 |
| Body Type | Roadster | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2553 cc | 2309 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 100 HP | 85 HP |
| Engine RPM | 5500 RPM | 4400 RPM |
| Torque | 180 Nm | 160 Nm |
| Torque RPM | 2000 RPM | 1750 RPM |
| Engine Bore Size | 82.6 mm | 70 mm |
| Engine Stroke Size | 79.5 mm | 100 mm |
| Engine Compression Ratio | 7.8:1 | 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 | 813 kg | 1360 kg |
| Vehicle Length | 3860 mm | 4580 mm |
| Vehicle Width | 1490 mm | 1730 mm |
| Vehicle Height | 1250 mm | 1570 mm |
| Wheelbase Size | 2290 mm | 2900 mm |
