المشاركة الأصلية كتبت بواسطة Adham
من ويكيبيديا
Gross hp was measured using a blueprinted test engine running on a stand without accessories, air cleaner, mufflers, or emissions control devices and sometimes fitted with long tube "test headers" in lieu of the OEM exhaust manifolds. The atmospheric correction standard (e.g. barometric pressure, humidity and temperature) that was utilized in obtaining the Gross ratings was more idealistic than that which is used under the SAE net rating system. The resulting Gross power (and torque) figures therefore reflected a maximum, theoretical value and not the power of an installed engine in a street car. Gross horsepower figures were also subject to considerable adjustment by the manufacturer's advertising and marketing staff under the direction of product managers. The power ratings of mass-market engines were often exaggerated beyond their actual Gross output, while those of the highest-performance muscle car engines often tended to be closer in actual output to their advertised, Gross ratings
الفرق بينهم هو الفرق بين موتور متقاس قدرتة الحصانية بدون توصيل ملحقات الموتور (فلتر هواء-شكمان-ربما الدينامو و خلافة
و بين موتور متسقط في سيارة بما علية من احمال و ملحقات
و الله أعلم