Everything I've ever seen in both English and Spanish looked about 1.5-2 times longer in the Spanish version.
Don't take my word for it; some linguistic researchers actually looked into this, which you can read about here.
Here's an excerpt:
For all of the other languages, the researchers discovered, the more data-dense the average syllable was, the fewer of those syllables had to be spoken per second — and thus the slower the speech. English, with a high information density of