Q: i want to delete my COC in my iphone 6 and download it again using different apple id, am i going to have my old village since i will download it on same device?

this is a question best posed to the software developer http://supercell.com/en/ OR in one of the many forums http://forum.supercell.net/forumdisplay.php/4-Clash-of-Clans

coc forum - Google Search

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am i going to have my old village since i will download it on same device?

No.

You need to keep your Game Centre login the same, as that's what holds your game progress (i.e. your village). Your Apple ID (the thing you use for making purchases/downloading apps) doesn't have to be the same as your Game Centre, and neither does your iCloud. Information on changing your Game Centre credentials is posted below. Change these after logging in with your new Apple ID.

Using Game Center on your Mac or iOS device - Apple Support

Sign in with a different Apple ID on your iPhone, iPad, or iPod touch - Apple Support

Hope this helps

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