I think that's because they're not really equivalent. At least for me, a hole the size of 2 washing machines is something that will look close to two washing machines put together. That limits the shape it can have. On the other hand, 92 cubic centimeters doesn't. It could be a 1cm x 1cm x 92cm hole, which wouldn't be possible with 2 washing machines.
If we assume that the two washing machines are side to side, and that the average washing machine is 60cm x 60cm x 85 cm (height), that would be a hole 1.20m width x 60 cm depth x 85 cm height. The washing machine example is still easier to visualize, but it's also better than "a 612 000 cubic centimeters hole".
How do you accurately visualize whether "hole in the road" means you saying "what was that?" And driving on without slowing. Or whether the hole will require a crane to get your car to a place where it can be towed if you, possibly inadvertently, attempt to drive over it?
> hole in the road that is about 92 cubic centimeters
92 cubic centimeters is a pretty small hole...
a hole in the road 1.5mx80cmx60cm is pretty easy to understand or imagine, when you know metric system and absolutely trivial to convert: ~0.70 cubic meters or ~700 liters or ~700.000 cubic centimeters
Washing machines comes of all sizes.
Is it like the slim one I have at home to save space or like the ones I find in laundromats?
Metric units have standards.
I don't know how many people would understand "a hole in the road the size of 137 trays of home made tiramisù"
TBF here too when the media want to make analogies, they are pretty terrible: "an asteroid the size of 8 soccer fields" means nothing to me, ~800 meters makes much more sense.
A big bottle of soda is 1000 or 2000 cubic centimeters. A can of soda is 200 or 300 cubic centimeters. A glass of water has 200 or 300 cubic centimeters. 92 cubic centimeters is half a glass of water.
If we assume that the two washing machines are side to side, and that the average washing machine is 60cm x 60cm x 85 cm (height), that would be a hole 1.20m width x 60 cm depth x 85 cm height. The washing machine example is still easier to visualize, but it's also better than "a 612 000 cubic centimeters hole".