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Lotus Elan S4

(1971 model)

Brief specs of 1971 Lotus Elan S4

2-seater convertible (cabriolet), petrol (gasoline) 4-cylinder straight (inline) engine, 1558 cm3 / 95.1 cu in / 95.1 cu in, 81.0 kW / 108.6 hp / 108.6 hp @ 6000 rpm / 6000 rpm / 6000 rpm

units: metric UK US

Basic (general) data

Marque (make)LotusIssued from1971
ModelElan S4Issued until
SerieElanNumber made
Model familyBody construction
Model codeBody designation
ManufacturerLotusCountryUK

Bodywork

Base platformNumber of doors
Bodywork typeconvertible (cabriolet)Number of seats2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length3690 mm / 145.3 in / 145.3 inTotal (curb) weight700 kg / 1543 lb / 1543 lb
Width1430 mm / 56.3 in / 56.3 inDry weight
Height1170 mm / 46.1 in / 46.1 inLoad capacity
WheelbaseGross (max.) weight
Track frontTowing weight
Track rearWeight distribution (front)
Ground clearance160 mm / 6.3 in / 6.3 inFuel capacity
Length/wheelbase ratio  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)0.4Frontal area (A)1.42 m2 / 15.3 sq ft / 15.3 sq ft (est.)
Aerodynamic coefficient (Cd×A)0.57 m2 / 6.1 sq ft / 6.1 sq ft (est.)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)14.1 kW / 19.0 hp / 19.0 hp (est.)

Engine

Engine CodeTotal number of cylinders4
Engine Typestraight (inline) (Inline, 4 cylinder)Total number of valves
Engine ManufacturerValves per cylinder
Engine constructionBore
Fuelpetrol (gasoline)Stroke
Fuel detailsBore/Stroke ratio
Fuel supplyCarburettorEngine displacement1558 cm3 / 95.1 cu in / 95.1 cu in
Engine Main bearingsUnitary capacity
Cam DesignCompression ratio
SumpMax. output power81.0 kW / 108.6 hp / 108.6 hp at 6000 rpm / 6000 rpm / 6000 rpm
AspirationnaturalMax. torque at
Compressor typeMaximum rpm
IntercoolerMax. net output (power at the wheels)32.4 kW / 43.4 hp / 43.4 hp (est.)
CoolantSpecific output52.0 kW/l / 1.143 bhp/cu in / 1.143 bhp/cu in
Catalytic converterSpecific torque

Transmission

Transmission typeNumber of gears
Wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio157.1 kW/ton / 119.0 bhp/ton / 119.0 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 circle9.0 m / 29.5 ft / 29.5 ft
Suspension frontSuspension rear
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdiscBrakes reardisc
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Lotus Elan S4

Infobox

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