The 20/30 hp ES Sport is a rear wheel drive saloon (sedan) motor vehicle with a front located engine, manufactured by Alfa Romeo.
It is powered by a naturally aspirated engine of 4.8 litre capacity. This powerplant features side valve valve gear, 4 cylinder layout, and 2 valves per cylinder. It develops 67 bhp (68 PS/50 kW) of power at 2600 rpm.
The engine drives the wheels through a 4 speed manual gearbox.
Claimed weight at the kerb is 1200 kg.
Maximum quoted speed is 130 km/h (81 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 | 2800 mm | 110.2 inches | |
| Track/tread (front) | 1450 mm | 57.1 inches | |
| Track/tread (rear) | 1450 mm | 57.1 inches | |
| Length | 4700 mm | 185 inches | |
| Width | 1780 mm | 70.1 inches | |
| Height | 1700 mm | 66.9 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.68 | ||
| Kerb weight | 1200 kg | 2646 lb | |
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Alfa Romeo | ||
| Engine code | |||
| Cylinders | Straight 4 | ||
| Capacity | 4.8 litre 4750 cc (289.863 cu in) |
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| Bore × Stroke | 102 × 130 mm
4.02 × 5.12 in |
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| Bore/stroke ratio | 0.78 | ||
| Valve gear | side valve (SV)
2 valves per cylinder 8 valves in total |
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| maximum power output | 68 PS (67 bhp) (50 kW) at 2600 rpm |
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| maximum torque | |||
| Specific output | 10.5 kW/litre 14.3 ps/litre 14.1 bhp/litre 0.23 bhp/cu in |
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| Engine construction | cast iron block | ||
| Lubrication | |||
| compression ratio | 4.45:1 | ||
| Fuel system | 1 Ze carb | ||
| bmep (brake mean effective pressure) | |||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 1187.5 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 | 130 km/h (81 mph) | ||
| Power-to-weight ratio | Higher is better 56.61 PS/tonne (1000 kg) 0.06 PS/kg 41.63 kW/tonne (1000 kg) 0.04 kW/kg 55.83 bhp/tonne (1000 kg) 0.06 bhp/kg 0.02 bhp/lb |
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| Weight-to-power ratio | Lower is better 24.02 kg/kW 40.12 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 | LA.LS. | ||
| Rear suspension | LA.LS. | ||
| Wheel size front | |||
| Wheel size rear | |||
| Tyres front | 820 x 120 | ||
| Tyres rear | 820 x 120 | ||
| Brakes F/R | -/Dr | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | |||
| general | |||
| Carfolio.com ID | 51249 | ||
| Production total | 124 | ||
| Model code | |||
| RAC rating | 25.8 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1921 Alfa Romeo 20/30 hp ES Sport added before December 1995. Last modified 2013-02-28. |
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