its actually a german measurement.. 'pefidershtarke' or something
- from wikipedia..
PS
This unit (German: Pferdestärke = horse strength) is still commonly used in Germany, central Europe, and Japan, although not a lawful unit any more. Informally, it remains in use, and the advertisements of firms of other countries that make products that compete against these (e.g., motorcycles) use it too. It was adopted throughout continental Europe with designations equivalent to the English "horse power", but mathematically different from the British unit. It is defined by the Physikalisch-Technische Bundesanstalt (PTB)[2] (http://www.ptb.de/) in Braunschweig as exactly: