This has been discussed on COPA, but nobody knwos for sure. MIGHT be a bout a future new version, for example with a 4-cylinder Diesel engine. Some others thought it might be a bout a new 2-seat trainer version. But that is pure speculation. But the guide is from 2015, so it might be be about something new.
Just further educating myself with cirrus perspektive sr2x Pilot’s guide i found out on page 109 there is engine indication page for SR18. Google didn’t find anything on this. Some planned model?
