Well from the name, which translates to "two horses", I was under the impression that the original 2CV had 2 horsepower. Yes, two.

A quick net search confirms that my high school French teacher wasn't lying...

"The first 2CVs, designated 'A' series, had a 375cc engine and were rated at two horsepower on the French fiscal rating (hence its name 2CV or 'two horses')"

Obviously they've added more power since then, but I'm still not sure I'd trade in a good pair of blue jeans for a 2CV. :)