M51, m21 swap

[ftowntrash]

is it possible? How hard would it be?

[SpecM]

into what?

an e30 I assume?

m21 wouldn't be that bad, as e30 324d/td's came with them stock

m51 might be a little harder, but I'm sure its possable

[daniel]

i thought this thread title was a typo for a second.

[Edev]

i thought this thread title was a typo for a second.

I thought the same thing over on bimmerforums.

[thornado327i]

is it possible? How hard would it be?

Why??

M21 is... well... slow as hell. Things like turbo upgrade are not worth the money spent.
M51 - better, but by any means not economy car.

If you want a diesel in E30 try M45 - probably lots of work, but you get an economy diesel with some power to go.