1937 Austin Big 7

The Austin Big 7 is a saloon (sedan) style road car with a front mounted engine supplying power to the rear wheels. The 0.9 litre engine is a naturally aspirated, side valve, 4 cylinder unit that develops 25 bhp (25.3 PS/18.6 kW) of power at 4000 rpm. The engine supplies its power through to the wheels via a 4 speed manual gearbox. Its quoted weight at the kerb is 737 kg.


Key facts

1937 Austin Big 7 information summary

What body style?
sedan/saloon with 4/5 seats
How long?
3404 mm
How heavy?
737 kg
What size engine?
0.9 litre, 900 cm3
How many cylinders?
4, Straight
How much power?
25.3 PS / 25 bhp / 18.6 kW @ 4000 rpm
How much torque?

Similar models

2 door sedan/​saloon FR 4M 1158 cm3 25.6 PS 25.2 bhp 18.8 kW 830 kg
1937 Austin Big 7 data
Body type4/5 seater sedan/saloon
Number of doors
dimensions & weights
Wheelbase 2223 mm 87.5 inches
Track/tread (front) 1143 mm 45 inches
Track/tread (rear) 1143 mm 45 inches
Length 3404 mm 134 inches
Width 1372 mm 54 inches
Ground clearance 146 mm 5.7 inches
length:wheelbase ratio 1.53
Kerb weight 737 kg 1625 lb
Weight distribution
fuel tank capacity 27.3 litres 6 UK Gal 7.2 US Gal
Drag coefficient
Frontal area
engine type naturally aspirated petrol
Engine manufacturer Austin
Engine code
Cylinders Straight 4
Capacity 0.9 litre
900 cc
(54.921 cu in)
Bore × Stroke 56.77 × 88.9 mm
2.24 × 3.5 in
Bore/stroke ratio 0.64
Valve gear side valve (SV)
2 valves per cylinder
8 valves in total
maximum power output 25.3 PS (25 bhp) (18.6 kW)
at 4000 rpm
Specific output 27.8 bhp/litre
0.46 bhp/cu in
maximum torque
Specific torque
Engine construction
compression ratio
Fuel system
bmep (brake mean effective pressure)
Maximum RPM
crankshaft bearings
Engine coolant Water
Unitary capacity 225 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
Acceleration 0-80km/h (50mph)
Acceleration 0-60mph
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph)
Standing quarter-mile
Standing kilometre
Maximum speed
Power-to-weight ratio 34.39 PS/tonne (1000 kg)
25.3 kW/tonne (1000 kg)
33.92 bhp/tonne (1000 kg)
0.02 bhp/lb
Weight-to-power ratio 39.53 kg/kW
66.04 lb/bhp
fuel consumption
Fuel consumption
universal consumption (calculated from the above)
Carbon dioxide emissions
Carfolio Calculated CO2 ?
VED band (UK)
CO2 Effizienz (DE)
Engine position front
Engine layout longitudinal
Drive wheels rear wheel drive  
Torque split N/A
turns lock-to-lock
Turning circle
Front suspension LA.SE.
Rear suspension LA.SE.
Wheel size front
Wheel size rear
Tyres front
Tyres rear
Brakes F/R
Front brake diameter
Rear brake diameter
Braked area
Gearbox 4 speed manual
Top gear ratio 1
Final drive ratio 5.13
Carfolio.com ID50743
Production total
Model code
Model family
RAC rating 8.0
Insurance classification No information available
Tax band No information available
1937 Austin Big 7 added before December 1995.
Last modified 2013-02-28.