The Fairthorpe Atom Mark I is a rear wheel drive motor car, with its engine placed in the rear, and a 2 door coupé body.
The power is produced by a naturally aspirated engine of 0.2 litre capacity. This unit features overhead valve valve gear, 1 cylinder layout, and 2 valves per cylinder. It develops 12 bhp (12.2 PS/8.9 kW) of power at 5300 rpm, and maximum torque of 19 N·m (14 lb·ft/1.9 kgm) at 3700 rpm.
The engine delivers its power through to the wheels via a 3 speed manual transmission.
Stated kerb weight is 426 kg.
Full specs
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| bodywork | |||
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| Body type | 2 seater fixed-head coupé | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2261 mm | 89 inches | |
| Track/tread (front) | 1143 mm | 45 inches | |
| Track/tread (rear) | 1219 mm | 48 inches | |
| Length | 3658 mm | 144 inches | |
| Width | 1524 mm | 60 inches | |
| Height | 1372 mm | 54 inches | |
| Ground clearance | 191 mm | 7.5 inches | |
| length:wheelbase ratio | 1.62 | ||
| Kerb weight | 426 kg | 939 lb | |
| Weight distribution | |||
| fuel tank capacity | 18.2 litres | 4 [4.8] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | |||
| Engine code | |||
| Cylinders | 1 | ||
| Capacity | 0.2 litre 248 cc (15.134 cu in) |
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| Bore × Stroke | 63 × 80 mm
2.48 × 3.15 in |
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| Bore/stroke ratio | 0.79 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 2 valves in total |
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| maximum power output (Net) |
12.2 PS (12 bhp) (8.9 kW) at 5300 rpm |
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| maximum torque (Net) |
19 Nm (14 ft·lb) (1.9 kgm) at 3700 rpm |
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| Specific output (Net) |
36.1 kW/litre 49.1 ps/litre 48.4 bhp/litre 0.79 bhp/cu in |
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| Specific torque (Net) |
76.61 Nm/litre
0.93 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | 6.5:1 | ||
| Fuel system | 1 Am carb | ||
| bmep (brake mean effective pressure) | 962.7 kPa (139.6 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Air | ||
| Unitary capacity | 248 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 | Higher is better 28.56 PS/tonne (1000 kg) 0.03 PS/kg 21.01 kW/tonne (1000 kg) 0.02 kW/kg 28.17 bhp/tonne (1000 kg) 0.03 bhp/kg 0.01 bhp/lb |
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| Weight-to-power ratio | Lower is better 47.61 kg/kW 79.52 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 | rear | ||
| Engine layout | unknown | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | I.CS. | ||
| Rear suspension | I.CS. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | |||
| Tyres rear | |||
| Brakes F/R | Dr/Dr | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 3 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 7.98 | ||
| general | |||
| Carfolio.com ID | 46959 | ||
| Production total | |||
| Model code | |||
| RAC rating | 2.5 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1955 Fairthorpe Atom Mark I added before December 1995. Last modified 2013-02-28. |
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