About 50 minutes into the film the raiding alien ships are reported capable of extremely rapid acceleration: "They can evidently reach a velocity of several parsecs". But a parsec is an astronomical unit of distance (a contraction of the phrase "parallax second"), not a unit of velocity. One parsec is equivalent to a distance of 3.26 light years or 19.2 trillion miles. See more
Tilk (Male Robot)
Listen Tilly, I've written a poem for you. Wanna hear it? It's called Passion in a Printed Circuit.