Rebuild Rover 3.9 V8 versus fit Thor 4.0

[100SRV]

Hi,
Dilemma time:
Rebuild Rover 3.9 V8 versus fit Thor 4.0

The 3.9 engine I have at the moment probably needs a new set of piston rings as it is burning oil (not the heads as I fitted new ACR ones about fourteen months ago). This 3.9 is running SU carbs and other than needing the rings doing is a good, sound engine.

BUT

I've been offered a 4.0 Thor V8 out of a Discovery 2 which I hope should be fit and forget.

Questions:
Can the Thor V8 be fitted in a similar manner as the older 14CUX engines - i.e. provide speed signal, ignition and power etc and off you go, or is there more to it than that?

What is a reasonable price for a Thor V8?

Are parts like injectors and airflow meter for the Motronic system very expensive to replace?

[eliot]

Cant answer how you would get the oem thor engine working, but you could megasquirt it Or, perhaps use a old 14cux injection system on it - would require dizzy (and therefore an old front timing cover) and also the fuel rail would need converting to a "returned" system with a regulator (thor is dead-headed).

?

[v8 jago]

IMO the 3.9 are the stronger engine. They seem to run forever or there about. Where some 4.0 temds to have problems with the liners moving. I would say it is up to you as to what you want and how much you want to spend. You might never have a liner problem but on the other hand it would be sods law for it to go after you have the engine in.