Damn you chris!

S14 engines cam cover slopes back at the back, that dont.
That one doesnt have VVT as you can see it by the front cam cover shape etc, S14s have VVT on the inlet cam.
S14s have different breather connections too.

Its either a Pulsar SR20DET (unlikely TBH)

Or MUCH more likely...

An S13's SR2DET Didnt have em in the UK, but S13s from 1991 till when they finally stopped making em in 1998 they had the Non-VVT SR20.

They also had the smaller T25G turbo and different inlet manifold.