what sort of compression figures should I expect from a 1275 A+

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi

Compression always depends on what piston dish size, gasket thickness volume, and head chamber capacity. measure the swept volume add to the total of the three above capacities and again devide that total by the total of the three capacities being head chamber, gasket and piston dish.

Swept volume = Bore radius times 22, devide by 7, multiply by stroke length.
Always easier to work this in Millimeters.
One will be surprised how many engine builders don't have a clue how to work this and they bore blocks out and machine heads down and bolt them together without even thinking that the compression can go through the roof.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

mine was second hand, un reco'd etc. compression was 175,180,180,175.

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real men race downhill - keiichi tsuchiya

thanks guys

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'62 Morris 850 (Marion)
'65 Mini Delux - sleeper 1275/S discs (Ms Plum)
'69 Vanden Plas Princess 1300
'71 Wolseley 1300
'74 Austin 1300 Countryman
'94 XJ6 Sport 3.2
'04 Rover 75 CDTi