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Napier 40/50

(1919 model)

Brief specs of 1919 Napier 40/50

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, SOHC (single overhead camshaft), 6105 cm3 / 372.5 cu in / 372.5 cu in, 61.1 kW / 81.9 hp / 81.9 hp @ 2000 rpm / 2000 rpm / 2000 rpm, manual 4-speed transmission, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)NapierIssued from1919
Model40/50Issued until
Serie40Number made
Model familyBody construction
Model codeBody designation
ManufacturerNapierCountryUK

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

Length4572 mm / 180.0 in / 180.0 inTotal (curb) weight1880 kg / 4145 lb / 4145 lb
WidthDry weight
HeightLoad capacity
Wheelbase3480 mm / 137.0 in / 137.0 inGross (max.) weight
Track front1422 mm / 56.0 in / 56.0 inTowing weight
Track rear1422 mm / 56.0 in / 56.0 inWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio1.31  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)Frontal area (A)
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 ManufacturerNapierValves per cylinder2
Engine constructionBore101.6 mm / 4.00 in / 4.00 in
Fuelpetrol (gasoline)Stroke127.0 mm / 5.00 in / 5.00 in
Fuel detailsBore/Stroke ratio0.8
Fuel supply1 Napier-SU carbEngine displacement6105 cm3 / 372.5 cu in / 372.5 cu in
Engine Main bearings7Unitary capacity1017.50 cm3/cylinder / 62.092 cu in/cylinder / 62.092 cu in/cylinder
Cam DesignSOHC (single overhead camshaft)Compression ratio
SumpMax. output power61.1 kW / 81.9 hp / 81.9 hp at 2000 rpm / 2000 rpm / 2000 rpm
AspirationnaturalMax. torque at
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)24.4 kW / 32.8 hp / 32.8 hp (est.)
CoolantwaterSpecific output10.0 kW/l / 0.220 bhp/cu in / 0.220 bhp/cu in
Catalytic converternoSpecific torque

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio3.3

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio43.6 kW/ton / 33.0 bhp/ton / 33.0 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 circle
Suspension frontLive axle, Semi-elliptic leaf springsSuspension rearLive axle, Cantilevernt
Wheels frontWheels rear
Tyres front895 x 135Tyres rear895 x 135
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Napier 40/50

Infobox

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There are several discount programmes offered by many insurance companies, which we summarized below. Availability of each discount, discount rates and age requirements may vary by insurance company and by state, indeed. Also be aware that certain types vehicles may not qualify, you should always check with your insurance provider.

Anti-Theft Discount

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