2007 Acura RDX vs. 1957 Armstrong Siddeley Sapphire
To start off, 2007 Acura RDX is newer by 50 year(s). Which means there will be less support and parts availability for 1957 Armstrong Siddeley Sapphire. In addition, the cost of maintenance, including insurance, on 1957 Armstrong Siddeley Sapphire would be higher. At 2,309 cc (6 cylinders), 1957 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 2007 Acura RDX (240 HP @ 6000 RPM) has 155 more horse power than 1957 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM). In normal driving conditions, 2007 Acura RDX should accelerate faster than 1957 Armstrong Siddeley Sapphire.
Because 2007 Acura RDX is four wheel drive (4WD), it will have significant more traction and grip than 1957 Armstrong Siddeley Sapphire. In wet, icy, snow, or gravel driving conditions, 2007 Acura RDX will offer significantly more control. 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, 2007 Acura RDX (353 Nm @ 4500 RPM) has 192 more torque (in Nm) than 1957 Armstrong Siddeley Sapphire. (161 Nm @ 1750 RPM). This means 2007 Acura RDX will have an easier job in driving up hills or pulling heavy equipment than 1957 Armstrong Siddeley Sapphire.
Compare all specifications:
| 2007 Acura RDX | 1957 Armstrong Siddeley Sapphire | |
| Make | Acura | Armstrong Siddeley |
| Model | RDX | Sapphire |
| Year Released | 2007 | 1957 |
| Body Type | SUV | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2300 cc | 2309 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 240 HP | 85 HP |
| Engine RPM | 6000 RPM | 4400 RPM |
| Torque | 353 Nm | 161 Nm |
| Torque RPM | 4500 RPM | 1750 RPM |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Length | 4600 mm | 4580 mm |
| Vehicle Width | 1880 mm | 1750 mm |
| Vehicle Height | 1660 mm | 1570 mm |
| Wheelbase Size | 2660 mm | 2900 mm |
| Fuel Tank Capacity | 68 L | 72 L |
