I'd say way under-powered.
Rule of thumb is to locate the MAX hull horsepower rating of the hull (normally on the manufacturer's data plate), and then calculate 75% of that. Don't go under 75%.
The 25 MV hull has a MAX HP of 300-325 (depending on year), which means you need somewhere between 225 and 250 HP. The DV hull has a MAX HP of 500, which means you need 375 HP.
The twin F-115s drive my 2510 MV fine, but there are bluebird days when I wish I had more HP to cruise at 35 instead of 25. I believe most of the folks here on CP with 25 MV hulls are running 225 to 250 singles, with one who recently re-powered to twin F-150s. The single 225-250 drive these boats very well.
I believe most of the 25 DVs are running twin 200s or better. I remember someone saying they had a 25 DV with a single 250, but don't remember their numbers.
If for some reason I ever need to repower, I'll likely go with a pair of F-150s.