Thanks very much for the answers. The engine is dead now because the timing chain snapped. Before that the engine was burning oil about 1 litre for 250 km. Because the rebuild of that engine is extremely expensive I just thought of buying an engine from a crashed car which is way more cheaper thank rebuilding the old one.

Edit: I asked because I was not sure about the bottom end of the two engines. Some say there are differences. But I think the differences are just in the cylinder head ?! Injectors, etc...