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Swallow Doretti Mk I

(1954 model)

Brief specs of 1954 Swallow Doretti Mk I

2-door 2-seater drophead coupé (convertible coupé), petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1991 cm3 / 121.5 cu in / 121.5 cu in, 67.1 kW / 90.0 hp / 90.0 hp @ 4800 rpm / 4800 rpm / 4800 rpm, 159.0 N·m / 117.3 lb·ft / 117.3 lb·ft @ 3000 rpm / 3000 rpm / 3000 rpm, manual with overdrive 4-speed transmission, rear wheel drive, 169 km/h / 105 mph / 105 mph top speed

units: metric UK US

Basic (general) data

Marque (make)Swallow DorettiIssued from1954
ModelMk IIssued until
SerieMkNumber made
Model familyBody construction
Model codeBody designation
ManufacturerSwallow DorettiCountryUK

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

Length3962 mm / 156.0 in / 156.0 inTotal (curb) weight864 kg / 1905 lb / 1905 lb
Width1549 mm / 61.0 in / 61.0 inDry weight
Height1295 mm / 51.0 in / 51.0 inLoad capacity
Wheelbase2413 mm / 95.0 in / 95.0 inGross (max.) weight
Track front1219 mm / 48.0 in / 48.0 inTowing weight
Track rear1254 mm / 49.4 in / 49.4 inWeight distribution (front)52.0 % / 52.0 % / 52.0 %
Ground clearance152 mm / 6.0 in / 6.0 inFuel capacity57 l / 12.5 UK gal / 15.0 US gal
Length/wheelbase ratio1.64  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)1.71 m2 / 18.4 sq ft / 18.4 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 ManufacturerTriumphValves per cylinder2
Engine constructionBore83.0 mm / 3.27 in / 3.27 in
Fuelpetrol (gasoline)Stroke92.0 mm / 3.62 in / 3.62 in
Fuel detailsBore/Stroke ratio0.9
Fuel supply2 SU H4 carbsEngine displacement1991 cm3 / 121.5 cu in / 121.5 cu in
Engine Main bearingsUnitary capacity497.75 cm3/cylinder / 30.375 cu in/cylinder / 30.375 cu in/cylinder
Cam DesignOHV (overhead valve, I-head)Compression ratio8.5 : 1
SumpwetMax. output power67.1 kW / 90.0 hp / 90.0 hp at 4800 rpm / 4800 rpm / 4800 rpm
AspirationnaturalMax. torque159.0 N·m / 117.3 lb·ft / 117.3 lb·ft at 3000 rpm / 3000 rpm / 3000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)25.7 kW / 34.5 hp / 34.5 hp (est.)
CoolantwaterSpecific output33.7 kW/l / 0.741 bhp/cu in / 0.741 bhp/cu in
Catalytic converternoSpecific torque79.9 N·m/l / 0.70 lb·ft/cu in / 0.70 lb·ft/cu in

Transmission

Transmission typemanual with overdriveNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio0.82
  Final gear (drive) ratio3.7

Performance

Acceleration 0-50 mph (80 km/h)7.80 s / 7.80 s / 7.80 sTop (maximal) speed169 km/h / 105 mph / 105 mph
Acceleration 0-60 mph (97 km/h)11.60 s / 11.60 s / 11.60 sPower-to-weight ratio104.2 kW/ton / 78.9 bhp/ton / 78.9 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
SteeringSteering details
Turns lock-to-lockTurning circle11.1 m / 36.4 ft / 36.4 ft
Suspension frontIndependent, Coil springs, Wishbone (A-arm, control arm)Suspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres front5.50 x 15Tyres rear5.50 x 15
Brakes frontdrumBrakes reardrum
Brake diameter front254 mm / 10.0 in / 10.0 inBrake diameter rear229 mm / 9.0 in / 9.0 in
Brakes detailsBraked area

Technical specifications and performance data of Swallow Doretti Mk I

Infobox

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