On Car and Classic someone is selling a Q4 which is advertised with a spare engine , it might be worth contacting him to see if he would sell separately ? Good luckI would say that you're extremely unlikely to find one in the UK. I think your best chance is to try somewhere like Germany, as there's quite a good selection of Q4 spares over there. Here's a couple of listings that might be of use to you:
Alfa 164 Q4 ,QV Teile,Motor,6Gang Getriebe,StoßDämpfer,Spoiler in guten zustand. | eBay
Alfa Romeo 164 Q4 in original Zustand mit leichten frontschaden. | eBay
On a separate note; would you mind telling me more about your Q4? I only know of three in the country so I'm wondering if there's more out there!
I think the advert you're referring to is for the sale of a 164 QV with a spare QV-spec engine. The Q4 engine isn't quite the same - it has a slightly different wiring loom and a different version of the Bosch engine management system for starters. It probably could be made to work in a Q4 but I don't think it would be easy work!On Car and Classic someone is selling a Q4 which is advertised with a spare engine , it might be worth contacting him to see if he would sell separately ? Good luck
I know that the Q4 has different ECU and air flow meter than a uk spec FWD 164 24v Cloverleaf. However, I'm thinking that a 24 valver from a Leaf would be fine for your car as long as the front crankshaft sensor on the front pully and the camshaft sensor are the same along with the throttle position sensor then I see no issues. Take a look at a Leaf and see if they are the same.Just to add speedfire - I think you'll also find the following site useful (if you're not already a member).
Alfa Romeo 164 Register.com ? Alfa Romeo 164 Register