Armstrong Siddeley Star Sapphire is a car that has a 4 door saloon (sedan) body style with a front mounted engine driving through the rear wheels.
It's powered courtesy of a naturally aspirated engine of 4 litre capacity. This unit features overhead valve valve gear, 6 cylinder layout, and 2 valves per cylinder. It has an output of 145 bhp (147 PS/108 kW) of power at 4250 rpm, and maximum torque of 312 N·m (230 lb·ft/31.8 kgm) at 2000 rpm.
The engine delivers its power through to the wheels via a 3 speed automatic gearbox.
The Armstrong Siddeley Star Sapphire weighs a quoted 1778 kg at the kerb.
It is claimed to attain a top speed of 160 km/h (99 mph).
Full specs
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| bodywork | |||
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| Body type | 4/5 seater sedan/saloon | ||
| Number of doors | 4 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2896 mm | 114 inches | |
| Track/tread (front) | 1470 mm | 57.9 inches | |
| Track/tread (rear) | 1460 mm | 57.5 inches | |
| Length | 4930 mm | 194.1 inches | |
| Width | 1880 mm | 74 inches | |
| Height | 1575 mm | 62 inches | |
| Ground clearance | 216 mm | 8.5 inches | |
| length:wheelbase ratio | 1.7 | ||
| Kerb weight | 1778 kg | 3920 lb | |
| Weight distribution | |||
| fuel tank capacity | 72.7 litres | 16 [19.2] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Armstrong-Siddeley | ||
| Engine code | |||
| Cylinders | Straight 6 | ||
| Capacity | 4 litre 3990 cc (243.485 cu in) |
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| Bore × Stroke | 97 × 90 mm
3.82 × 3.54 in |
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| Bore/stroke ratio | 1.08 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 12 valves in total |
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| maximum power output (Net) |
147 PS (145 bhp) (108 kW) at 4250 rpm |
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| maximum torque (Net) |
312 Nm (230 ft·lb) (31.8 kgm) at 2000 rpm |
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| Specific output (Net) |
27.1 kW/litre 36.8 ps/litre 36.3 bhp/litre 0.6 bhp/cu in |
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| Specific torque (Net) |
78.2 Nm/litre
0.95 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | 7.5:1 | ||
| Fuel system | 2 Ze carbs | ||
| bmep (brake mean effective pressure) | 982.6 kPa (142.5 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 665 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | 11.3 s | ||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 160 km/h (99 mph) | ||
| Power-to-weight ratio | Higher is better 82.69 PS/tonne (1000 kg) 0.08 PS/kg 60.81 kW/tonne (1000 kg) 0.06 kW/kg 81.55 bhp/tonne (1000 kg) 0.08 bhp/kg 0.04 bhp/lb |
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| Weight-to-power ratio | Lower is better 16.44 kg/kW 27.47 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/litre | |||
| UK MPG | |||
| US MPG | |||
| Carbon dioxide emissions | |||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | |||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | power assisted rack & pinion | ||
| turns lock-to-lock | 3.800 | ||
| Turning circle | 11.60 m | ||
| Front suspension | I.W.CS. | ||
| Rear suspension | LA.SE. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | |||
| Tyres rear | |||
| Brakes F/R | Di/Di-S | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 3 speed automatic | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.77 | ||
| general | |||
| Carfolio.com ID | 49357 | ||
| Production total | |||
| Model code | |||
| RAC rating | 35.0 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1958 Armstrong Siddeley Star Sapphire added before December 1995. Last modified 2013-02-28. |
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