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Alvis Speed Twenty SB

(1933 model)

Brief specs of 1933 Alvis Speed Twenty SB

2-door 2+2-seater drophead coupé (convertible coupé), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, OHV (overhead valve, I-head), 2511 cm3 / 153.2 cu in / 153.2 cu in, 64.9 kW / 87.0 hp / 87.0 hp @ 4000 rpm / 4000 rpm / 4000 rpm, rear wheel drive, 143 km/h / 89 mph / 89 mph top speed

units: metric UK US

Basic (general) data

Marque (make)AlvisIssued from1933
ModelSpeed Twenty SBIssued until
SerieSpeedNumber made
Model familyBody construction
Model codeBody designation
ManufacturerAlvisCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typedrophead coupé (convertible coupé)Number of seats2+2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4572 mm / 180.0 in / 180.0 inTotal (curb) weight1372 kg / 3025 lb / 3025 lb
Width1689 mm / 66.5 in / 66.5 inDry weight
HeightLoad capacity
Wheelbase3124 mm / 123.0 in / 123.0 inGross (max.) weight
Track front1422 mm / 56.0 in / 56.0 inTowing weight
Track rear1422 mm / 56.0 in / 56.0 inWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio1.46  

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 ManufacturerAlvisValves per cylinder2
Engine constructionBore73.0 mm / 2.87 in / 2.87 in
Fuelpetrol (gasoline)Stroke100.0 mm / 3.94 in / 3.94 in
Fuel detailsBore/Stroke ratio0.73
Fuel supply3 SU carbsEngine displacement2511 cm3 / 153.2 cu in / 153.2 cu in
Engine Main bearingsUnitary capacity418.50 cm3/cylinder / 25.538 cu in/cylinder / 25.538 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio6.3 : 1
SumpMax. output power64.9 kW / 87.0 hp / 87.0 hp at 4000 rpm / 4000 rpm / 4000 rpm
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)10.4 kW / 13.9 hp / 13.9 hp (est.)
CoolantwaterSpecific output25.9 kW/l / 0.568 bhp/cu in / 0.568 bhp/cu in
Catalytic converternoSpecific torque

Transmission

Transmission typeNumber of gears
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.55

Performance

Acceleration 0-50 mph (80 km/h)13.50 s / 13.50 s / 13.50 sTop (maximal) speed143 km/h / 89 mph / 89 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio63.4 kW/ton / 48.0 bhp/ton / 48.0 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 frontSuspension rear
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Alvis Speed Twenty SB

Infobox

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(...)

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