But not with a JTDM unit under the bonnet
Personally, the only 90's to early Y2K Alfa's that will be up there in the collectables section will be few owners, good quality original examples and GTA's, sporting the Busso V6. Just the look, design, engineering and noise (as regarded by most as the best sounding V6 in the w-o-r-l-d - with my best Clarkson voice)
of that engine will give it proper clout. Afterall this is the closest thing to a Ferrari engine by the chap who did their V8's. nuff said
Twin Sparks - possibly in 2.0 format in Veloce/Lusso spec (smaller units / Turismo - not a chance) The stigma is that bottom end coming from Fiat - didn't it come off a Tipo??
Diesels - I can't think of anyone I know who would be up for a future classic with an oil burner - doesn't really the float the boat of owning a collectable / classic car.
(I've probably upset a few by my anti-diesel'ist comments, but I have an oil burner alongside the two petrol Alfa's and the only thing diesel is good for is mileage and economy for the daily commute) - I wouldn't be tucking one away thats for sure
On the GT front, it would need to be a Black Line / Cloverleaf edition - not sure if that got a V6 or just 1.8TS ??
So in short, you need to buy a V6. Period
Favourite top 5 .... anything with a V6 ... If you can actually find a top notch 164 V6 they are at good money already and will only go up!!