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Sunbeam 20

(1927 model)

Brief specs of 1927 Sunbeam 20

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, OHV (overhead valve, I-head), 2916 cm3 / 177.9 cu in / 177.9 cu in, 41.0 kW / 55.0 hp / 55.0 hp @ 3600 rpm / 3600 rpm / 3600 rpm, manual 4-speed transmission, rear wheel drive, 122 km/h / 76 mph / 76 mph top speed

units: metric UK US

Basic (general) data

Marque (make)SunbeamIssued from1927
Model20Issued until
Serie20Number made
Model familyBody construction
Model codeBody designation
ManufacturerSunbeamCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typedrophead coupé (convertible coupé)Number of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4451 mm / 175.2 in / 175.2 inTotal (curb) weight1372 kg / 3025 lb / 3025 lb
Width1803 mm / 71.0 in / 71.0 inDry weight
HeightLoad capacity
Wheelbase3162 mm / 124.5 in / 124.5 inGross (max.) weight
Track front1397 mm / 55.0 in / 55.0 inTowing weight
Track rear1397 mm / 55.0 in / 55.0 inWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio1.41  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders6
Engine Typestraight (inline) Total number of valves12
Engine ManufacturerSunbeamValves per cylinder2
Engine constructionBore75.0 mm / 2.95 in / 2.95 in
Fuelpetrol (gasoline)Stroke110.0 mm / 4.33 in / 4.33 in
Fuel detailsBore/Stroke ratio0.68
Fuel supply1 Claudel-Hobson carbEngine displacement2916 cm3 / 177.9 cu in / 177.9 cu in
Engine Main bearingsUnitary capacity486.00 cm3/cylinder / 29.658 cu in/cylinder / 29.658 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio5.5 : 1
SumpMax. output power41.0 kW / 55.0 hp / 55.0 hp at 3600 rpm / 3600 rpm / 3600 rpm
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)16.4 kW / 22.0 hp / 22.0 hp (est.)
CoolantwaterSpecific output14.1 kW/l / 0.309 bhp/cu in / 0.309 bhp/cu in
Catalytic converternoSpecific torque

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio5.5
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed122 km/h / 76 mph / 76 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio40.1 kW/ton / 30.4 bhp/ton / 30.4 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
SteeringSteering details
Turns lock-to-lockTurning circle
Suspension frontLive axle, Semi-elliptic leaf springsSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres front31 x 5.25Tyres rear31 x 5.25
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Sunbeam 20

Infobox

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