Interchange compatibility 75 and 90

[The Count]

Hi all...

Anyone know how many Alfa 75 "bits" are compatible with the Alfa 90?

Possible I can pick up a reasonably priced 75 and use for some spares for a 90. Both have the 2.5 litre Busso motor which is a good start but what other parts might be usable in the 90? (My 90 is a 1985 2.5 V6 and the 75 is a 1988 2.5l V6 auto)

Any info as always gratefully received!

[aggie57]

Engine, suspension, brakes, steering, and that's about it. No body parts, no trim parts of note, different tranmsision and tailshaft, different pretty much everything else. Plus the bits that are in common are, well, common.

But the auto will have a LSD centre and the power steering rack. Both will have some value if in good condition.

[four90s]

Fuel pump, filter and some of the lines as well and some of the underbonnet electrics are common to both.

The trans on the 75 can be used to make an automatic 90 which is a nice car. I must make another one one day. I had to junk the last one as it was the rustiest of the 7 90s that I have had.

Steve
Adelaide

[Sheldon McIntosh]

I think the only common parts in the interior are the stalks, but of course some 75 stalks are orange. 

Fuel pump relay is always a good spare to have.....

[colcol]

Talking to a 90 enthusiest, the early 90's are based on the Alfa 6, that wasn't sold here, and the later 90's were based on the 75, or the 75's were based on the late 90's, Colin.

[Sheldon McIntosh]

Bloody hell, didn't think I'd ever be able to correct Uncle Colcol, but here we go....

90s have nothing to do with the Alfa 6, other than having the same engine block.  The 90 might have been inspired by the 6, but that's it.  The 6 is not even a transaxle car.

The 90 was based on the Alfetta (many parts are interchangeable between late Alfettas and 90s), and the 75 was based on the Giulietta (I've heard doors are interchangeable, but can't confirm that). 

[colcol]

I will tell my mate he is wrong!, he was telling me about buying bits for his early 90 and was finding that things were from the Alfa 6 and not the 75, such as brake parts and steering, not body panels or trim, obviously, and that bits were hard to get for the early 90's, but not the later ones.
I suppose its like Suds and 33's, the bits look the same until you try to interchange them, Colin.

[Sheldon McIntosh]

Come to think of it, he might have been referring to the fact that the late 90s (Supers) replaced the soggy suspension and long gearing of the early 90s (GCLs) with the stiffer bars and springs of the 75, along with the same gear ratios of the 75.

Other than that, the only differences between GCL and Super are the replacement of digital dash for analogue, and the grille.  Oh yeah, and deleting of the trip computer.

[four90s]

Sheldon, thanks for correcting that misinformation about the Six/90 crossover.
That sort of thing ends up being "fact" as someone knows someone who knows someone who saw it on the internet.

Actually, you could still get the trip computer on a 90 Super. The first 90s were all GCL's where the Supers seemed to have been imported in three different levels of trim. (Which line up with a 90 sales brochure I have kicking around somewhere).

The trip computer was only fitted to the GCL's and the SCL's (Silver Clover Leaf) and the "no Clover Leaf" (nCL) models didn't have them. Just speaking from the experience of owning one of each.

Tragically, I still have one each of a 90 Super GCL and a 90 Super nCL.

Steve, 90 Tragic
Adelaide

[Mick A]

You should keep the engine out of the 75 as a good spare. They are usually in fantastic condition for their age because they don't get thrashed being attached to an automatic box.

[Sheldon McIntosh]

Actually, you could still get the trip computer on a 90 Super. The first 90s were all GCL's where the Supers seemed to have been imported in three different levels of trim. (Which line up with a 90 sales brochure I have kicking around somewhere).

The trip computer was only fitted to the GCL's and the SCL's (Silver Clover Leaf) and the "no Clover Leaf" (nCL) models didn't have them. Just speaking from the experience of owning one of each.

Wow, didn't know that.  I thought the Super we got only came in one spec.  I guess all my Supers have been nCLs then.    What were the other differences between the models?

Cheers
Sheldon

[aggie57]

Reading this thread makes you realise how many variations Alfa made in those days, pretty ridiculous for what was really a small volume manufacturer. I mean not only could you buy a 75 or a 90, so different in so many ways, but in Italy with either one or both you could get a 4 or 6 cylinder, a 1.6, 1.8 or 2.0 four, 2.0, 2.5 or 3.0 V6's, and different trim levels, wheel and brakes, and more. Then in the US and Canada the Milano was so different again.

[four90s]

It's even more complicated than that Alister, as you could get, as well as your list, 1.8 injected and turbo'd (75) 1.8 and 2.0 carby  (both 75 and 90) 2.0 L-jet with variable cam (90) and the 2.4 litre diesel, in the 90 at least and possibly in the 75 as well.

Another little thing I just found out yesterday is that the turbo 2.0 V6 was fitted to the 916 series GTVs.

Now, where did I put that 2.0 V6......

Steve
Adelaide

[aggie57]

It's even more complicated than that Alister, as you could get, as well as your list, 1.8 injected and turbo'd (75) 1.8 and 2.0 carby  (both 75 and 90) 2.0 L-jet with variable cam (90) and the 2.4 litre diesel, in the 90 at least and possibly in the 75 as well.

Another little thing I just found out yesterday is that the turbo 2.0 V6 was fitted to the 916 series GTVs.

Now, where did I put that 2.0 V6......

Steve
Adelaide

Good point. Of course the 90 2.0 V6 had a CEM injection system rather than the Bosch one. Complete with individual throttle bodies and different manifold.