Did you read the description, the boat does 52 knots at WOT and cruisers best at 40...this engine burns 142 L/h at WOT so I'd say this boat would cruise 30 knots at around 3500 rpm where this engine burns around 45L/h so that's around 180 liters all 4 engines per hour at 3500 rpm not 480 liters you're claiming.
For the power and speed she could be twice the length for a better overall boat! More fuel and room as it’s obviously built for charter on charter money!
No one told them they could have gone for diesels instead. 2X Zeus/IPS or similar. Those XTOs are around 275 k$ together so... You get from A to B though, if you pass the gasoline pump 😉🤣.
oh shut up. most greenhouse gasses in the world comes from the decomposition of food waste, pleasure yachts are a VERY VERY small contributor to greenhouse gas emissions.