well, i can take a jab at two of them.
the bore is how big (diameter) the cylinder is the larger the more volume of air/fuel you can accomodate in the cumbustion chamber.
stroke I'am not sure of but may have to do with the distance the piston actually travels up and down the cylinder.
the compression ratio: the higher the compression ratio is the more the piston compresses the air/fuel mixture at the up stroke. which means you need a higher octane fuel to handle the high compression. because if you use a lower octane fuel it is more likely to combust before the piston reaches top dead zero<---i think thats what they call it. or basically where the piston is meant to stop at up stroke when the spark plug sparks the compressed mixture of air/fuel.
I hope that helped.
you can try
www.howstuffworks.com
they give a good explanation of everything.
Linear Mode
