Deano 1 Report post Posted November 4, 2011 Been researching this and come to the conclusion without comparing pistons and stripping the engines etc is Blocks marked 25 6E 1 or 2 are 9.7:1 CR and found in pre facelift, pre cat Euro's and SA imports Blocks marked 25 6K 1 or 2 are 8.8:1 CR and are the Catalytic preped engines as found in Jap imports and US spec motors. ?? Quote Share this post Link to post Share on other sites
Deano 1 Report post Posted November 5, 2011 Further investigation reveal facts from SA import handbook from 1989 model I have as 9.4:1 engine coded 25 6E 2. Can anyone else add there wisdom? Quote Share this post Link to post Share on other sites
