I know wine doesnt have the calorie content on the bottle, but you can usually google the nutrition information for most things, then use the 1 syn = 20 calories rule to work out the syns as there is no free food allowance in alcohol.
As a rule of thumb, the lower alcohol content wines are usually lower calories/syns (so 5% lambrini types are lowest, then your 9/10% ones, 12/13% are the highest)