The L245 is also Kubotas way of advertising the horse power: i.e. GROSS HP.=24.5.., (cu. in.), I would guess close to 65.8 cubes! PTO HP would be a probably be around 22/+-?
It is one tough and durable tractor! I have it's big brother, (L295DT); it has 79.3 cu. in., that I purchased new 30+ years ago, and is still runniing strong, with no issues! The engines are rated at 2800 RPM for that HP.