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HRG Twin Cam Prototype

(1955 model)

Brief specs of 1955 HRG Twin Cam Prototype

2-door 2-seater roadster, petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, DOHC (double overhead camshafts, twin cam), 1500 cm3 / 91.5 cu in / 91.5 cu in, 80.5 kW / 108.0 hp / 108.0 hp @ 5750 rpm / 5750 rpm / 5750 rpm, manual 4-speed transmission, rear wheel drive, 193 km/h / 120 mph / 120 mph top speed

units: metric UK US

Basic (general) data

Marque (make)HRGIssued from1955
ModelTwin Cam PrototypeIssued until
SerieTwinNumber made
Model familyBody construction
Model codeBody designation
ManufacturerHRGCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typeroadsterNumber of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length3835 mm / 151.0 in / 151.0 inTotal (curb) weight737 kg / 1625 lb / 1625 lb
Width1473 mm / 58.0 in / 58.0 inDry weight
HeightLoad capacity
Wheelbase2438 mm / 96.0 in / 96.0 inGross (max.) weight
Track front1219 mm / 48.0 in / 48.0 inTowing weight
Track rear1219 mm / 48.0 in / 48.0 inWeight distribution (front)
Ground clearance178 mm / 7.0 in / 7.0 inFuel capacity55 l / 12.0 UK gal / 14.4 US gal
Length/wheelbase ratio1.57  

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 cylinders4
Engine Typestraight (inline) Total number of valves8
Engine ManufacturerValves per cylinder2
Engine constructionBore73.0 mm / 2.87 in / 2.87 in
Fuelpetrol (gasoline)Stroke89.6 mm / 3.53 in / 3.53 in
Fuel detailsBore/Stroke ratio0.81
Fuel supply2 So carbsEngine displacement1500 cm3 / 91.5 cu in / 91.5 cu in
Engine Main bearingsUnitary capacity375.00 cm3/cylinder / 22.884 cu in/cylinder / 22.884 cu in/cylinder
Cam DesignDOHC (double overhead camshafts, twin cam)Compression ratio8.8 : 1
SumpMax. output power80.5 kW / 108.0 hp / 108.0 hp at 5750 rpm / 5750 rpm / 5750 rpm
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)30.6 kW / 41.1 hp / 41.1 hp (est.)
CoolantotherSpecific output53.7 kW/l / 1.179 bhp/cu in / 1.179 bhp/cu in
Catalytic converternoSpecific torque

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.11

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed193 km/h / 120 mph / 120 mph
Acceleration 0-60 mph (97 km/h)9.60 s / 9.60 s / 9.60 sPower-to-weight ratio146.5 kW/ton / 111.0 bhp/ton / 111.0 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 frontIndependent, Transverse leaf springSuspension rearIndependent, Transverse leaf spring
Wheels frontWheels rear
Tyres front5.25-16Tyres rear5.25-16
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of HRG Twin Cam Prototype

Infobox

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