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Napier 18 L49

(1903 model)

Brief specs of 1903 Napier 18 L49

6-cylinder 12-valve straight (inline) engine, side valves (flathead, L-block, L-head), 4855 cm3 / 296.3 cu in / 296.3 cu in, rear wheel drive

units: metric UK US

Basic (general) data

Marque (make)NapierIssued from1903
Model18 L49Issued until
Serie18Number made
Model familyBody construction
Model codeBody designation
ManufacturerNapierCountryUK

Bodywork

Base platformNumber of doors
Bodywork typeNumber of seats
Bodywork designerCargo capacity (volume)
Passenger space (volume)Max. cargo capacity (volume)

Dimensions & Weight

LengthTotal (curb) weight
WidthDry weight
HeightLoad capacity
Wheelbase2629 mm / 103.5 in / 103.5 inGross (max.) weight
Track front1270 mm / 50.0 in / 50.0 inTowing weight
Track rear1270 mm / 50.0 in / 50.0 inWeight distribution (front)
Ground clearanceFuel capacity
Length/wheelbase ratio  

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
FuelStroke101.6 mm / 4.00 in / 4.00 in
Fuel detailsBore/Stroke ratio1
Fuel supply1 Napier carbEngine displacement4855 cm3 / 296.3 cu in / 296.3 cu in
Engine Main bearingsUnitary capacity809.17 cm3/cylinder / 49.379 cu in/cylinder / 49.379 cu in/cylinder
Cam Designside valves (flathead, L-block, L-head)Compression ratio
SumpMax. output power at
AspirationMax. torque at
Compressor typeMaximum rpm
IntercoolerMax. net output (power at the wheels)
CoolantwaterSpecific output
Catalytic converterSpecific torque

Transmission

Transmission typeNumber of gears
Wheel driverear wheel driveTop gear (drive) ratio
  Final gear (drive) ratio

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed
Acceleration 0-60 mph (97 km/h)Power-to-weight ratio
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 frontSuspension rearLive axle, Semi-elliptic leaf springs
Wheels frontWheels rear
Tyres frontTyres rear
Brakes frontBrakes rear
Brake diameter frontBrake diameter rear
Brakes detailsBraked area

Technical specifications and performance data of Napier 18 L49

Infobox

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