1955 Armstrong Siddeley Sapphire vs. 1973 BMW 1502
To start off, 1973 BMW 1502 is newer by 18 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 3,435 cc (6 cylinders), 1955 Armstrong Siddeley Sapphire is equipped with a bigger engine. In terms of performance, 1955 Armstrong Siddeley Sapphire (125 HP @ 4700 RPM) has 40 more horse power than 1973 BMW 1502. (85 HP @ 5800 RPM). In normal driving conditions, 1955 Armstrong Siddeley Sapphire should accelerate faster than 1973 BMW 1502. With that said, vehicle weight also plays an important factor in acceleration. 1955 Armstrong Siddeley Sapphire weights approximately 900 kg more than 1973 BMW 1502. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1955 Armstrong Siddeley Sapphire (247 Nm @ 2000 RPM) has 117 more torque (in Nm) than 1973 BMW 1502. (130 Nm @ 3500 RPM). This means 1955 Armstrong Siddeley Sapphire will have an easier job in driving up hills or pulling heavy equipment than 1973 BMW 1502.
Compare all specifications:
| 1955 Armstrong Siddeley Sapphire | 1973 BMW 1502 | |
| Make | Armstrong Siddeley | BMW |
| Model | Sapphire | 1502 |
| Year Released | 1955 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 3435 cc | 1573 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 125 HP | 85 HP |
| Engine RPM | 4700 RPM | 5800 RPM |
| Torque | 247 Nm | 130 Nm |
| Torque RPM | 2000 RPM | 3500 RPM |
| Engine Bore Size | 90 mm | 84 mm |
| Engine Stroke Size | 90 mm | 71 mm |
| Engine Compression Ratio | 7.0:1 | 8.6:1 |
| Number of Seats | 7 seats | 5 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1830 kg | 930 kg |
| Vehicle Length | 5390 mm | 4240 mm |
| Vehicle Width | 1840 mm | 1600 mm |
| Vehicle Height | 1680 mm | 1420 mm |
| Wheelbase Size | 3380 mm | 2510 mm |
| Fuel Tank Capacity | 72 L | 50 L |
