bmwe21.net forums

Hey all
I am mohanad hani from egypt. i wanted to ask u some questions.
because i decided to make an engine swap to my E21 i wanted to know what is the engine that i can fit in easily without any modification ??

An e30 m20/2.5 but you need a 320/323 subframe and dual pipe sender unit for the added fuel line. (assuming your car is a 316)

i don't want to get a subframe i want to just remove the old and install the new. what do you think about an M40B18 ?
and what's better than that ?

It won't fit unless you modify your subframe.

M40 doesn't bring much extra I guess. How about M42 with custom engine mounts?

i want to easily fit an engine guys. M42 must make a modification and i don't like doing that cause it's never made safely here in egypt

Then there's only one option, modify your M10...

ok thanks alot guys for helping.
so the easiest engine to be easily installed is the M20 then the M42 ?

M20 still requires a new subframe, there's a thread around here somewhere that has pictures comparing the two, showing the differences. M10's aren't bad engines, and if you do it right it'll still be a blast to drive.

what do you think about an M20B20 ? is it good and doesn't have much proplems and have good fuel efficeny ?

Nope, power isn't much more that from your current engine, fuel economy isn't all that and you need a matching E21 M20 gearbox to get the speedometer to work. My suggestions: tune that M10 or if you really want to modify the subframe and if you can source an E21 M20 gearbox go for a M20B25 or M50B25. Cheap to buy, powerful and fuel efficient, but it will be more of a project.

I would also turbo the m10.

my M10 died :S now i must go for a swap. M20B20 or M40B16/18 ?!

Get another m10?

M10 + turbo.