Austin Big Seven 1937-39 specifications

Engine
4 Cylinder in line
Bore: 56.8mm
Stroke: 89mm
Displacement: 900cc
Valves: 8, side
Main bearings: 3
Carburation: Zenith downdraught
Power output: 23bhp at 4,000rpm

Performance
Maximum speed: 57.3mph
Acceleration: 0-50 mph 25.4secs
Overall fuel consumption: 32mpg

Ignition
6 volt coil,
14mm Champion L10 plugs

Transmission
Rear wheel drive
Clutch: single, dry plate
Gearbox: 4-speed,
Syncromesh on on 2nd & top
Rear wheel drive
Ratios: Top 5.25, 3rd 8.73,
2nd 13.85 1st 22.94 &
reverse 29.49 to 1
Propellar Shaft: torque tube
Rear axle: three quarter floating
spiral bevel

Steering
Worm and sector
Turning circle: 30ft

Construction
Steel body bolted to
steel A-frame chassis

Brakes
Mechanical, wedge & roller
7in drums

Suspension
Front: Semi eliptic tranverse leaf
Rear: quarter eliptic leaf
Shock absorbers: friction type

Wheels & Tyres
16in 'easy clean' ventilated pressed steel
475 x 16in crossply

Dimensions & Weight
Wheelbase: 7ft 3.5in
Track - front: 3ft 7in
Track - rear: 3ft 9in
Overall length: 11ft 2in
Overall width: 4ft 6in
Overall height: 5ft 3in
Ground clearance: 5.75in
Unladen weight: 14.5cwt
Tank capacity: 6 gallons
Sump capacity: 5 pints

Production
1937-39: 23,514
Price new in 1937 (with sliding head):£160