Hello! Today all corporation make hybrid cars (fuel+electricity)
What if install in BA electroengine, li-ion (polymer) battery and some fuel engine?
Does any firm in Europe make this type of "upgrade"?

Why?

not for economic, maybe for ecologic,
just interesting, how much. I want to make my car free of gasoline

I guess as much expensive as a new Toyota Prius.. Maybe more, because nothing will fit or work like your petrol car do now

Its too early to do anything like that yet, plus it'd be a big job to swap engines over and wire everything in. Most of the time if you swap an engine from one make to another, you have to reposition the engine mounts.

and by the time you have done that its probably not even worth it, but good luck if you do try, and you will be the only one in the world!!

Yes, it's too early. It's like in film "Back in Future":)) And I think, that big corporaion never allow to do this in next 10-15 years. But now often use another type of hybrid (benzine and propane). And I believe, that soon conversion from petrol to El.hybrid will be usual service.
I recieve one answer from servicecentre: you need to by Prius and rplace engine and transmission to your cars, if it will be possible geometricaly. And cost from 20000$.

and if you do that, you crazy , for that money I should buy an new real hybrid

nice idea, would make the only eco car to look good (with the notable exception of a tezla roadstar)
But me thinks this type of thing will take a while till it happens

think you can buy 3

You could do this on your current engine

http://www.youtube.com/watch?v=UVhXrvCCILw