Yep, as others have said, this is the French Citroen 2CV... It got it's name from the abbreviation of "Deux Cheval", or "Two Horses"... You've guessed it, 2 horse power!
VERY dangerous cars... Prone to tipping over with the high ride, narrow width and soft suspension and also very poor crash survival rates. None the less, they became a sort of cult car and only stopped being made in maybe the late 80's or early 90's.
I remember a neighbour of mine had one when I was a teenager. Four of us had a few beers one night, and with one person in each corner, we bounced the car 90 degrees on the guy's driveway. The next morning he was completely baffled and had to do a 20-point turn to get out of his driveway.