The original 16" Alpina wheels were 8J and fitted without spacers, but no idea on the offset. It's worth checking the Wiki Wheels page to confirm other wheels of the same dimension fit.
They'll fit.
It'll depend on the drop on the suspension too.
ALpina 8j wore 225/45/16 tyres, but on a standard height suspension.
If you have lowered springs, you will need to roll the rear arches, and use a smaller sidewall tyre too.
If you Got "Haters",Then your doing something Right! CR24v??? Where's it all gone?? LOL