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Lagonda 2½-Litre Mk I

(1946 model)

Brief specs of 1946 Lagonda 2½-Litre Mk I

2-door 5-seater drophead coupé (convertible coupé), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, DOHC (double overhead camshafts, twin cam), 2580 cm3 / 157.4 cu in / 157.4 cu in, 78.3 kW / 105.0 hp / 105.0 hp @ 5000 rpm / 5000 rpm / 5000 rpm, 180.0 N·m / 132.8 lb·ft / 132.8 lb·ft @ 3000 rpm / 3000 rpm / 3000 rpm, manual 4-speed transmission, rear wheel drive, 135 km/h / 84 mph / 84 mph top speed

units: metric UK US

Basic (general) data

Marque (make)LagondaIssued from1946
Model2½-Litre Mk IIssued until
Serie2.5-LitreNumber made
Model familyBody construction
Model codeBody designation
ManufacturerLagondaCountryUK

Bodywork

Base platformNumber of doors2
Bodywork typedrophead coupé (convertible coupé)Number of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4775 mm / 188.0 in / 188.0 inTotal (curb) weight1471 kg / 3243 lb / 3243 lb
Width1727 mm / 68.0 in / 68.0 inDry weight
Height1626 mm / 64.0 in / 64.0 inLoad capacity
Wheelbase2883 mm / 113.5 in / 113.5 inGross (max.) weight
Track front1432 mm / 56.4 in / 56.4 inTowing weight
Track rear1442 mm / 56.8 in / 56.8 inWeight distribution (front)48.5 % / 48.5 % / 48.5 %
Ground clearance178 mm / 7.0 in / 7.0 inFuel capacity86 l / 19.0 UK gal / 22.8 US gal
Length/wheelbase ratio1.66  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)2.39 m2 / 25.7 sq ft / 25.7 sq ft (est.)
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 ManufacturerAston MartinValves per cylinder2
Engine constructionBore78.0 mm / 3.07 in / 3.07 in
Fuelpetrol (gasoline)Stroke90.0 mm / 3.54 in / 3.54 in
Fuel detailsBore/Stroke ratio0.87
Fuel supply2 SU carbsEngine displacement2580 cm3 / 157.4 cu in / 157.4 cu in
Engine Main bearingsUnitary capacity430.00 cm3/cylinder / 26.240 cu in/cylinder / 26.240 cu in/cylinder
Cam DesignDOHC (double overhead camshafts, twin cam)Compression ratio6.5 : 1
SumpMax. output power78.3 kW / 105.0 hp / 105.0 hp at 5000 rpm / 5000 rpm / 5000 rpm
AspirationnaturalMax. torque180.0 N·m / 132.8 lb·ft / 132.8 lb·ft at 3000 rpm / 3000 rpm / 3000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)24.7 kW / 33.1 hp / 33.1 hp (est.)
CoolantwaterSpecific output30.4 kW/l / 0.667 bhp/cu in / 0.667 bhp/cu in
Catalytic converternoSpecific torque69.8 N·m/l / 0.61 lb·ft/cu in / 0.61 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio4.6

Performance

Acceleration 0-50 mph (80 km/h)12.70 s / 12.70 s / 12.70 sTop (maximal) speed135 km/h / 84 mph / 84 mph
Acceleration 0-60 mph (97 km/h)18.80 s / 18.80 s / 18.80 sPower-to-weight ratio71.4 kW/ton / 54.1 bhp/ton / 54.1 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 circle11.6 m / 38.1 ft / 38.1 ft
Suspension frontIndependent, Coil springsSuspension rearde Dion axle, Torsion bar
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontdrumBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Lagonda 2½-Litre Mk I

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