Know your mini engine:) From Minimania Most probably this data is valid only for UK Mini Engines and not for Japanese imports... If you have the engine tag still attached to the engine - just in front/below the thermostat housing - or perhaps the original engine number in the log book then the following should help you determine which engine you have. For Metro units, see 'Engine - Metro identification data'. Original engine identification numbers 850cc 8A Austin up to 2500