1956 Armstrong Siddeley Sapphire vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 50 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 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 243 more horse power than 1956 Armstrong Siddeley Sapphire. (85 HP @ 4400 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 1956 Armstrong Siddeley Sapphire. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 476 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 290 more torque (in Nm) than 1956 Armstrong Siddeley Sapphire. (160 Nm @ 1750 RPM). This means 2006 BMW 645 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 | 2006 BMW 645 | |
| Make | Armstrong Siddeley | BMW |
| Model | Sapphire | 645 |
| Year Released | 1956 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2307 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 85 HP | 328 HP |
| Engine RPM | 4400 RPM | 6100 RPM |
| Torque | 160 Nm | 450 Nm |
| Torque RPM | 1750 RPM | 3600 RPM |
| Engine Bore Size | 70 mm | 92 mm |
| Engine Stroke Size | 100 mm | 83 mm |
| Engine Compression Ratio | 7.5:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1360 kg | 1836 kg |
| Vehicle Length | 4580 mm | 4830 mm |
| Vehicle Width | 1730 mm | 1860 mm |
| Vehicle Height | 1570 mm | 1380 mm |
| Wheelbase Size | 2900 mm | 2790 mm |
