Just about to purchase my new headgasket from France....I have 2 uprated thicker headgasket options.....

I was wondering if anyone can tell me the effect on compression the two options would have...

Standard figures to aid calculation if poss....

Bore / Stroke - 88 x 82
Compression Ratio - 8:1
Standard Headgasket Thickness - 1.75mm

My options are 1.9mm or 2.1.

Can anyone help please?