National Highway Twelve is an automobile that has a 2 door roadster type body with a front located engine supplying power to the rear wheels.
The National Highway Twelve's engine is a naturally aspirated petrol, 5.5 litre, side valve 60 degree V 12 cylinder with 2 valves per cylinder. It has an output of 80 bhp (81 PS/60 kW) of power at 2800 rpm.
Power is transmitted to the wheels through a 3 speed manual gearbox.
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 3 seater roadster | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 3251 mm | 128 inches | |
| Track/tread (front) | 1422 mm | 56 inches | |
| Track/tread (rear) | 1422 mm | 56 inches | |
| Length | |||
| Width | |||
| Height | |||
| Ground clearance | |||
| length:wheelbase ratio | |||
| Kerb weight | |||
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | National | ||
| Engine code | |||
| Cylinders | V 12 in 60° vee | ||
| Capacity | 5.5 litre 5548 cc (338.56 cu in) |
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| Bore × Stroke | 69.85 × 120.65 mm
2.75 × 4.75 in |
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| Bore/stroke ratio | 0.58 | ||
| Valve gear | side valve (SV)
2 valves per cylinder 24 valves in total |
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| maximum power output | 81 PS (80 bhp) (60 kW) at 2800 rpm |
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| maximum torque | |||
| Specific output | 10.8 kW/litre 14.6 ps/litre 14.4 bhp/litre 0.24 bhp/cu in |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | |||
| Fuel system | 1 Rayfield carburettor | ||
| bmep (brake mean effective pressure) | |||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 462.33 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 | |||
| Power-to-weight ratio | |||
| Weight-to-power ratio | |||
| 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 | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | 36 x 4½ | ||
| Tyres rear | 36 x 4½ | ||
| Brakes F/R | |||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 3 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 4.58 | ||
| general | |||
| Carfolio.com ID | 201465 | ||
| Production total | |||
| Model code | |||
| RAC rating | 36.3 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1916 National Highway Twelve added 2009-08-31. Last modified 2013-02-28. |
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