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Lotus Elan S4

(1969 model)

Brief specs of 1969 Lotus Elan S4

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, DOHC (double overhead camshafts, twin cam), 1558 cm3 / 95.1 cu in / 95.1 cu in, 78.3 kW / 105.0 hp / 105.0 hp @ 5500 rpm / 5500 rpm / 5500 rpm, 147.0 N·m / 108.4 lb·ft / 108.4 lb·ft @ 4000 rpm / 4000 rpm / 4000 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)LotusIssued from1969
ModelElan S4Issued until
SerieElanNumber made
Model familyBody construction
Model codeBody designation
ManufacturerLotusCountryUK

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

Length3690 mm / 145.3 in / 145.3 inTotal (curb) weight688 kg / 1517 lb / 1517 lb
Width1422 mm / 56.0 in / 56.0 inDry weight
Height1168 mm / 46.0 in / 46.0 inLoad capacity
Wheelbase2134 mm / 84.0 in / 84.0 inGross (max.) weight
Track front1194 mm / 47.0 in / 47.0 inTowing weight
Track rear1232 mm / 48.5 in / 48.5 inWeight distribution (front)
Ground clearance152 mm / 6.0 in / 6.0 inFuel capacity46 l / 10.0 UK gal / 12.0 US gal
Length/wheelbase ratio1.73  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.41 m2 / 15.2 sq ft / 15.2 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) Total number of valves8
Engine ManufacturerLotusValves per cylinder2
Engine constructionBore82.6 mm / 3.25 in / 3.25 in
Fuelpetrol (gasoline)Stroke72.8 mm / 2.86 in / 2.86 in
Fuel detailsBore/Stroke ratio1.13
Fuel supply2 We carbsEngine displacement1558 cm3 / 95.1 cu in / 95.1 cu in
Engine Main bearingsUnitary capacity389.50 cm3/cylinder / 23.769 cu in/cylinder / 23.769 cu in/cylinder
Cam DesignDOHC (double overhead camshafts, twin cam)Compression ratio9.5 : 1
SumpwetMax. output power78.3 kW / 105.0 hp / 105.0 hp at 5500 rpm / 5500 rpm / 5500 rpm
AspirationnaturalMax. torque147.0 N·m / 108.4 lb·ft / 108.4 lb·ft at 4000 rpm / 4000 rpm / 4000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)31.3 kW / 42.0 hp / 42.0 hp (est.)
CoolantwaterSpecific output50.3 kW/l / 1.104 bhp/cu in / 1.104 bhp/cu in
Catalytic converternoSpecific torque94.3 N·m/l / 0.83 lb·ft/cu in / 0.83 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio3.77

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed193 km/h / 120 mph / 120 mph
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio152.6 kW/ton / 115.6 bhp/ton / 115.6 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-lock2.5Turning circle9.4 m / 30.8 ft / 30.8 ft
Suspension frontIndependent, Wishbone (A-arm, control arm), Coil springs, Anti-roll (anti-sway) bar (ARB)Suspension rearIndependent, Lower wishbone,ChmnS
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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