There is also a "metric gallon", or 4L.

Same with a Metric ton (a "tonne") which is one thousand kilograms (pretty close to an imperial ton).

Not to be confused with the 1600 meter or "1 mile" race which is commonly run in US track and field events (i.e. 4 times around a 400 meter track). At least that's within 1% of an actual mile.