4WD Cars with national/regional homologation

[denkimi]

Does it exist such a 4 cylinder 3000ccm, 5000E

why should it be a 4 cylinder?
that's the whole point. pushing stuff to the limit is very expensive, using commercially available stuff that nowhere near the limit is much cheaper.

but of course, if your competitors use the same engine, but start tuning it, it's ruined.