Кто подскажет аббревиатуру английского написания лошадиных сил.

HP horsepower.
PS - тоже самое, но в европейской метрической системе, то есть грубо говоря, те же HP, только в британской речи.

Metric horsepower (PS, cv, hk, pk, ks, ch)
The various units used to indicate this definition (PS, cv, hk, pk, ks and ch) all translate to horse power in English, so it is common to see these values referred to as horsepower or hp in the press releases or media coverage of the German, French, Italian, and Japanese automobile companies. British manufacturers often intermix metric horsepower and mechanical horsepower depending on the origin of the engine in question. Sometimes the metric horsepower rating of an engine is conservative enough so that the same figure can be used for both 80/1269/EEC with metric hp and SAE J1349 with imperial hp.