The Alvis Speed Twenty SA is a roadster with 4 doors and a front mounted engine which delivers the power to all four wheels.
It's powered courtesy of a naturally aspirated engine of 2.5 litre capacity. This powerplant features overhead valve valve gear, 6 cylinder layout, and 2 valves per cylinder. It develops 90 bhp (91 PS/67 kW) of power at 4500 rpm.
The engine transmits power to the wheels via a 4 speed manual set of gears.
The Alvis Speed Twenty SA weighs a claimed 1321 kg at the kerb.
Top stated speed is 142 km/h or 88 mph.
Full specs
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| bodywork | |||
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| Body type | 2+2 seater roadster | ||
| Number of doors | 4 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 3124 mm | 123 inches | |
| Track/tread (front) | 1321 mm | 52 inches | |
| Track/tread (rear) | 1321 mm | 52 inches | |
| Length | 4229 mm | 166.5 inches | |
| Width | 1651 mm | 65 inches | |
| Height | |||
| Ground clearance | |||
| length:wheelbase ratio | 1.35 | ||
| Kerb weight | 1321 kg | 2912 lb | |
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Alvis | ||
| Engine code | |||
| Cylinders | Straight 6 | ||
| Capacity | 2.5 litre 2511 cc (153.231 cu in) |
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| Bore × Stroke | 73 × 100 mm
2.87 × 3.94 in |
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| Bore/stroke ratio | 0.73 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 12 valves in total |
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| maximum power output | 91 PS (90 bhp) (67 kW) at 4500 rpm |
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| maximum torque | |||
| Specific output | 26.7 kW/litre 36.3 ps/litre 35.8 bhp/litre 0.59 bhp/cu in |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | |||
| Fuel system | 3 SU carbs | ||
| bmep (brake mean effective pressure) | |||
| Maximum RPM | |||
| crankshaft bearings | 4 | ||
| Engine coolant | Water | ||
| Unitary capacity | 418.5 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 142 km/h (88 mph) | ||
| Power-to-weight ratio | Higher is better 69.08 PS/tonne (1000 kg) 0.07 PS/kg 50.8 kW/tonne (1000 kg) 0.05 kW/kg 68.13 bhp/tonne (1000 kg) 0.07 bhp/kg 0.03 bhp/lb |
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| Weight-to-power ratio | Lower is better 19.68 kg/kW 32.88 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 | wheel drive | ||
| Torque split | |||
| Steering | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | LA.SE. | ||
| Rear suspension | LA.SE. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | |||
| Tyres rear | |||
| Brakes F/R | Dr/Dr | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 4.70 | ||
| general | |||
| Carfolio.com ID | 126797 | ||
| Production total | |||
| Model code | |||
| RAC rating | 19.8 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1932 Alvis Speed Twenty SA added 2005-03-08. Last modified 2013-02-28. |
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