WASHINGTON — Toyota’s Camry, the best-selling mid-size car in the United States, and its Prius V hybrid earned the lowest ratings in a new crash test simulating a severe front-end collision, an insurance group found.

The two Toyotas had the only ‘‘poor’’ scores on an Insurance Institute for Highway Safety test intended to evaluate a crash in which the front corner of a vehicle collides with another car or hits a tree or pole. It is more stringent than the US government’s test, which simulates a collision in which two vehicles or objects hit head-on.