Speed

The void engine's Speed determines how quickly a ship travels through the void -- a higher Speed engine will cover more AU in less time (Turns). Speed is also the most important ship attribute for changing Range, avoiding attacks and boarding at Range 4 or 5 during Ship Combat.

A 30 Speed Engine will travel roughly 3 AU in a single Turn, given ideal conditions. A 20 Speed Engine will travel roughly 1.8 AU in a single Turn, while a 10 Speed Engine will travel roughly 1.2 AU in a single Turn.

Note that in practice, failed skill saves will delay your ship's progress per unit time as the crew must grapple with exploding bulkheads, misused powerloaders, airlock accidents and space-born illnesses while still trying to navigate efficiently. Even if you use a skill save talent to address the issue, additional time will still pass in the void correcting for whatever issue you narrowly avoided.