The grandparent comment is correct. There is no such thing as engine-specific “maximum speed”. If you add more fuel, you can always go faster (until the speed of light).
Even “until the speed of light” has a caveat (hear me out). Would you call getting from A to B in 1 hour on your watch instead of 2 as “faster”? If your answer is yes, then there’s no limit to how “fast” you can go. You could get from here to the Andromeda Galaxy in one minute. It’s just that for the Andromeda and the Milky Way a LOT more time would have passed.
The grandparent comment is correct. There is no such thing as engine-specific “maximum speed”. If you add more fuel, you can always go faster (until the speed of light).
Even “until the speed of light” has a caveat (hear me out). Would you call getting from A to B in 1 hour on your watch instead of 2 as “faster”? If your answer is yes, then there’s no limit to how “fast” you can go. You could get from here to the Andromeda Galaxy in one minute. It’s just that for the Andromeda and the Milky Way a LOT more time would have passed.