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Napier 40/50

Bodywork

type 4/5S SAL
doors 4

Engine information

Bore × stroke 101.60 mm × 127.00 mm 4 in × 5 in
Cylinders S-6
Displace 6.1 litre 6105 cc (372.55 cu in)
Engine type SOHC
Valves 2 valves per cylinder | 12 valves in total
Engine construction
Sump
Compression ratio
Fuel system 1 Napier-SU carb
Maximum power 83.1 PS (82.0 bhp) (61.1 kW) @ 2000 rpm
0-50 mph
0-60 mph
0-100 mph
0-100 km/h
80 - 120 km/h
402 m (Quarter mile)
Standing km
Top speed
Fuel consumption
CO2 emissions
Power to weight ratio 43.62 bhp/ton
Specific output
Maximum torque
bmep
Specific torque
Maximum rpm
Code
Main bearings 7
Coolant Water
Bore / stroke ratio 0.8
Unitary capacity 1017.5 cc/cylinder
Aspiration Normal
Compressor type N/A
Intercooler None
Catalytic converter N

Dimensions and weight

wheelbase 3480 mm
wheelbase 137 in
Length (milimeters) 4572 mm
Length (inches) 180 in
Width (milimeters)
Width (inches)
Height (milimeters)
Height (inches)
L:W ratio 1.31
Ground clearance (milimeters)
Ground clearance (inches)
Kerb weight (kilograms) 1880 kg
Kerb weight (pounds) 4145 lb
Weight distribuiton
Fuel capacity (litres)
Fuel capacity (UK Ga)
Fuel capacity (US Gal)

Aerodynamics

Drag coefficient
Frontal area
Cx

Chassis

Engine location Front
Engine alignment Longitudinal
Drive RWD
Steering
Turns lock-to-lock
Turning circle
Tyres 895 x 135
Wheels
Brakes F/R
Brake ∅
Braked area
Transmission 4M
Top gear ratio 1.00
Final drive ratio 3.30

General information

RAC rating 38.4
Number made
Model code
Model family
Insurance classification No information available
Tax band No information available

Manual Download

Download 1919 Napier 40/50 PDF Manual
Designer unknown
Year 1919

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