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Lotus Eclat 521

(1974 model)

Brief specs of 1974 Lotus Eclat 521

2-door 2+2-seater fixed-head coupé, petrol (gasoline) 4-cylinder 16-valve straight (inline) engine, DOHC (double overhead camshafts, twin cam), 1973 cm3 / 120.4 cu in / 120.4 cu in, 119.3 kW / 160.0 hp / 160.0 hp @ 6200 rpm / 6200 rpm / 6200 rpm, 190.0 N·m / 140.1 lb·ft / 140.1 lb·ft @ 4900 rpm / 4900 rpm / 4900 rpm, manual 5-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)LotusIssued from1974
ModelEclat 521Issued until
SerieEclatNumber made
Model familyBody construction
Model codeBody designation
ManufacturerLotusCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typefixed-head coupéNumber of seats2+2
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4458 mm / 175.5 in / 175.5 inTotal (curb) weight1055 kg / 2326 lb / 2326 lb
Width1816 mm / 71.5 in / 71.5 inDry weight
Height1194 mm / 47.0 in / 47.0 inLoad capacity
Wheelbase2438 mm / 96.0 in / 96.0 inGross (max.) weight
Track front1486 mm / 58.5 in / 58.5 inTowing weight
Track rear1499 mm / 59.0 in / 59.0 inWeight distribution (front)
Ground clearanceFuel capacity67 l / 14.8 UK gal / 17.8 US gal
Length/wheelbase ratio1.83  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.84 m2 / 19.8 sq ft / 19.8 sq ft (est.)
Aerodynamic coefficient (Cd×A)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)

Engine

Engine CodeTotal number of cylinders4
Engine Typestraight (inline) (Inline, 4 cylinder)Total number of valves16
Engine ManufacturerLotusValves per cylinder4
Engine constructionBore95.2 mm / 3.75 in / 3.75 in
Fuelpetrol (gasoline)Stroke69.3 mm / 2.73 in / 2.73 in
Fuel detailsBore/Stroke ratio1.37
Fuel supply2 DO carbsEngine displacement1973 cm3 / 120.4 cu in / 120.4 cu in
Engine Main bearings5Unitary capacity493.25 cm3/cylinder / 30.100 cu in/cylinder / 30.100 cu in/cylinder
Cam DesignDOHC (double overhead camshafts, twin cam)Compression ratio9.5 : 1
SumpMax. output power119.3 kW / 160.0 hp / 160.0 hp at 6200 rpm / 6200 rpm / 6200 rpm
AspirationnaturalMax. torque190.0 N·m / 140.1 lb·ft / 140.1 lb·ft at 4900 rpm / 4900 rpm / 4900 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)47.7 kW / 64.0 hp / 64.0 hp (est.)
CoolantwaterSpecific output60.5 kW/l / 1.329 bhp/cu in / 1.329 bhp/cu in
Catalytic converternoSpecific torque96.3 N·m/l / 0.84 lb·ft/cu in / 0.84 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears5
Wheel driverear wheel driveTop gear (drive) ratio0.8
  Final gear (drive) ratio4.1

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio151.7 kW/ton / 114.9 bhp/ton / 114.9 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
Steeringrack & pinionSteering details
Turns lock-to-lockTurning circle
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springsSuspension rearIndependent, Wishbone (A-arm, control arm), Coil springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdiscBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Lotus Eclat 521

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