Soldato
It's the 2.0i sorry forgot to say!
similar running costs to 2.5/3.0's yet no poke! in my opinion the worst engine to go into a z4, from z4 forums it also is one of the least reliable engines BMW made with common warning lights and other problems.
car looks nice condition but engine in my opinion is terrible for a z4. - no offence of course, enjoy and hopefully it does treat you well.