Austin 30-hp
Vitesse tourer 1914
Overview
Manufacturer	Austin[1]
Production	1912 – 1916[2]
Assembly	Longbridge, NorthfieldBirmingham
Powertrain
Engine	5,883 cc (359.0 cu in)I4[2] 6,077 cc (370.8 cu in)I4[2]
Transmission	clutch, 4-speed gearbox, propeller shaft within a torque tube, brake drum behind first universal joint[3]
Dimensions
Wheelbase	129 in (3,276.6 mm) or 138 in (3,505.2 mm) track 55 in (1,397.0 mm)[2]
Length	171 in (4,343.4 mm) or 180 in (4,572.0 mm)[2]
Chronology
Predecessor	Austin 18-24
Successor	Austin 20

TheAustin 30-hp is a largeluxury car that was announced by British car manufacturerAustin at theParis Salon de l'Automobile in December 1912 where its chassis only was displayed. Austin's other exhibits were two other bare chassis, 10-hp and 20-hp respectively and a 40-hp Defiance tourer.

The new Austin 30 would go on to replace Austin's successful but aging18-24 for 1914. It provided the basis for Austin's wartime armoured car.

The 30 hp incorporated several technical innovations including:^[3]

• atorque tube encasing thepropeller shaft so articulated that it can move freely with lateral movement of the back axle.
• a sub-frame for the engine clutch and gearbox at two points rigidly bolted to the front cross-member but resting at its back end in a circular rubber pad borne by the middle cross-member. This is to isolate theframe and body from noise from thegearbox and vibration from the other machinery.
• thebrake drum is on the propeller shaft behind theuniversal joint, the drums and operating mechanism mounted on the forward end of the torque tube. The advantage is that the gear shaft and the front universal joint do not take the braking stresses. (By this time most manufacturers regarded transmission brakes obsolete)
• the lower portion of thedouble elliptic springs is slung beneath the back axle.
• the steering connections are in the form of pin joints rather than ball joints. In the event of breakage the joints will not come apart but the play would warn the driver without endangering car or occupants.^[3]

The Olympia Motor Show in November 1913 revealed the 30-hp would replace the 6-year-old18-24 in Austin's catalogue.^[4]

The engine's stroke was lengthened (it was now 111 mm x 157 mm) which did not affect its tax rating but increased its cubic capacity to 6.077-litres.^[4]

Revised equipment includes a new suspension of the gearbox and the addition of a torque rod to the differential casing.^[4]

The Austin 30 hp chassis formed the basis for the firstAustin Armoured Car, used inWorld War I mainly by Russia.^[5]

Wikimedia Commons has media related toAustin 30.

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• Cars introduced in 1912

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