The Jowett Jupiter Mk IA Convertible is a convertible/cabriolet with 2 doors and a front mounted engine which delivers the power through the rear wheels.
The power is produced by a naturally aspirated engine of 1.5 litre capacity. This unit features overhead valve valve gear, 4 cylinder layout, and 2 valves per cylinder. It has an output of 62.5 bhp (63 PS/47 kW) of power at 4500 rpm, and maximum torque of 114 N·m (84 lb·ft/11.6 kgm) at 3000 rpm.
A 4 speed manual gearbox supplies the power to the driven wheels.
The stated kerb weight is 860 kg.
Its maximum speed stated is 136 km/h or 85 mph.
Full specs
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| bodywork | |||
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| Body type | 2 seater convertible/cabriolet | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2362 mm | 93 inches | |
| Track/tread (front) | 1321 mm | 52 inches | |
| Track/tread (rear) | 1283 mm | 50.5 inches | |
| Length | 4267 mm | 168 inches | |
| Width | 1575 mm | 62 inches | |
| Height | 1422 mm | 56 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.81 | ||
| Kerb weight | 860 kg | 1896 lb | |
| Weight distribution | 56.1% front | ||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | 1.58 m² | ||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Jowett | ||
| Engine code | |||
| Cylinders | Flat 4 | ||
| Capacity | 1.5 litre 1486 cc (90.681 cu in) |
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| Bore × Stroke | 72.5 × 90 mm
2.85 × 3.54 in |
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| Bore/stroke ratio | 0.81 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 8 valves in total |
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| maximum power output | 63 PS (62.5 bhp) (47 kW) at 4500 rpm |
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| maximum torque | 114 Nm (84 ft·lb) (11.6 kgm) at 3000 rpm |
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| Specific output | 31.4 kW/litre 42.6 ps/litre 42.1 bhp/litre 0.69 bhp/cu in |
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| Specific torque |
76.72 Nm/litre
0.93 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | |||
| compression ratio | 8:1 | ||
| Fuel system | 2 Ze carbs | ||
| bmep (brake mean effective pressure) | 964 kPa (139.8 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 371.5 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | 11.7 s | ||
| Acceleration 0-60mph | 16.8 s | ||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | 20.7 s | ||
| Standing kilometre | |||
| Maximum speed | 136 km/h (85 mph) | ||
| Power-to-weight ratio | Higher is better 73.68 PS/tonne (1000 kg) 0.07 PS/kg 54.19 kW/tonne (1000 kg) 0.05 kW/kg 72.67 bhp/tonne (1000 kg) 0.07 bhp/kg 0.03 bhp/lb |
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| Weight-to-power ratio | Lower is better 18.45 kg/kW 30.82 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 | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | I.TB. | ||
| Rear suspension | LA.TB. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | |||
| Tyres rear | |||
| Brakes F/R | |||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 4.56 | ||
| general | |||
| Carfolio.com ID | 63987 | ||
| Production total | |||
| Model code | |||
| RAC rating | 13.0 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1952 Jowett Jupiter Mk IA Convertible added before December 1995. Last modified 2013-02-28. |
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