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Engines

A-series Cutaway

Standard Engines

Four basic A-Series engines were fitted as standard to A30s and A35s during their production. There were also both high and low compression versions, low mainly in commercial vehicles and signified by the LCS in the Chassis Number (GPO vans appeared to have a specific engine for them).

For more information on the engine design, please refer to Engine Design under our Austin History pages.

SizeEngine
No
Prefix
Notes
803cc2AFitted with a screw-on canister oil filter
948cc9A950 cast into block
1098cc10ABFitted to commercials in Low-comp form
848cc8GFitted to late vans †
† Engines starting 8G9 R are generally factory refurbished engines and mostly 948cc (see 950 casting on block): Gold-seal (full engine) or Silver-seal (short engine)

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Alternative engines

SizeEngine
No
Prefix
Notes
948cc9DAustin A40 Mk I
948cc9DBAustin A40 early Mk II
1098cc10D
10DD
Austin A40 Mk II
948cc9CG
9CC
Austin Healey Sprite Mk I (Frogeye)
1098cc10CGSprite Mk I/ MG Midget Mk I (1.75" main bearings)
1098cc10CCSprite Mk II/ MG Midget Mk II (2 inch main bearings)
1275cc12CC
12CE
Sprite Mk IV/ MG Midget Mk III (home market) after Oct '72, 12V/586F/H
1275cc12CD
12CJ
Sprite Mk IV/ MG Midget Mk III (US Market) 12V/671Z/L N. America

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Morris Engines

SizeEngine
No
Prefix
Notes
803ccAPHMSeries 2: fitted with SU originally
948ccAPJMSeries 3
948cc9MSeries 4
1098cc10MASeries 5
1098cc10MESeries 5, close circuit breather
948cc8AGMorris 1000 GPO van after 1962
1098cc10VMorris 1000 van closed circuit breather
1275cc12VMorris Marina/Ital: A+ thick flange block, fitted with screw-on filter at rear of block which may interfere with steering box

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Standard bore and stroke

A-Series

SizeBoreStroke
803cc2.28" / 58mm3" / 76.2mm
948cc2.477" / 62.94mm3" / 76.2mm
1098cc2.542" / 64.58mm3.3" / 83.72mm
848cc2.477" / 62.94mm2.76" / 68mm
1275cc2.78" / 70.61mm3.2" / 81.28mm