I'm afraid you're comparing "apples to oranges" - kills and experience are not, in any way, tied together. For instance, I currently have a Strategic Bomber with over 400 experience, but not even 100 kills. Conversely, I had a panzer with hundreds of kills, but only a few hundred experience.
Experience is effectively how hard the unit fought. A hard fight, against a prepared enemy, can mean lots of experience. A Strategic Bomber inflicting massive suppression on a target, lots of experience. Kills though, can sometimes happen very easily if the target is heavily suppressed. So in short, don't try to compare the two.
In the manual, on page 23, this is what is said about Experience:
The current experience points. Experience is earned in combat and lost when a unit gets green
replacements. Every 100 points of experience gives one experience star. Each star gives the
unit various bonuses to initiative, attack and defence, making the unit more powerful and
persistent. A unit can have a maximum of 5 stars.
Notice there's no mention of kills - only combat. I hope this helps to clarify!
< Message edited by Dreadgod -- 3/24/2012 2:30:51 AM >