The Natural Philosopher wrote:
Dave Plowman (News) wrote:
In article Chris Bacon wrote:
Someone else wrote, but the attributions were munged yet again:
The stroke of the piston and the size of the combustion chamber
determine the compression ratio.

No they don't.

Of course they do. It's the volume of the cylinder and combustion chamber
with the piston at BDC related to the volume with it at TDC.

Rubbish, Its the DESIGN of the ENGINE that determnes the compression ratio,

True...

No, its the THICKNESS OF THE HEAD GASKET.

True for some engine designs...

No. It MUST BE THE SHAPE OF THE PISTON.

True...


Don't you love people who are arguing about something, who are just
using different words to say the same thing?

You cannot determine the compression ratio from the stroke of the piston
and the size of the combustion chamber, letting the latter include the
thickness of the head gasket (if present), for the same piston shape.