Austin 7 AB Tourer ("Chummy") 1922-26
See specifications below illustration
Page 005 AB
Austin Seven AB Tourer 1922-26 specifications
2 bearing, 4 in-line, side valve,
Bore: 56mm
Stroke: 76.2mm
Displacement: 747cc
Compression ratio: approx 5.5:1
Carburettor:single Zenith 30VE1
Power output: 10.5bhp at 2,500rpm

Maximum speed: 51mph
Acceleration: 0-50mph 24 secs
Fuel consumption: 38mpg

Clutch: single dry plate
Gearbox: non-syncro, 3 speed manual

Steel body bolted to steel
A-form frame chassis, alluminium body

Worm & wheel,
11/4 turns lock to lock

Cable operated drums all round

Front: Beam axle with
tranverse half eliptic leaf spring
Rear: Quarter eliptic leaf springs
Austin made friction dampers

Wheels & Tyres
26” bolt-on wire, 3.5 balloon tyres

Dimensions & Weight
Wheelbase: 6ft 3in
Track F & B: 3ft 4in
Overall length: 9ft 2in
Overall width: 3ft 10in
Turning circle: 33ft
Kerb weight: 7.5cwt approx.
Tank capacity: 4 gallons

AD Tourer 1926-29
1927 Austin Sevens: 21,671
Total UK Austin 7 Saloon & Tourer
production 1922-39: 290,944