Breakdown of Il rotore è meno costoso di quanto temevo.
Questions & Answers about Il rotore è meno costoso di quanto temevo.
In Italian, nouns are very often used with an article where English might omit it.
So il rotore means the rotor:
- il = the
- rotore = rotor
If you were speaking in a general or dictionary-like way, you might sometimes see the noun without the article, but in a normal sentence like this, il is the natural choice.
Also, rotore is a masculine singular noun, so il is the correct article.