HHP-8

The HHP-8 (High Horse Power 8000) is a type of twin-cab electric locomotive manufactured by a consortium of Bombardier Transportation and Alstom for use by Amtrak and the Maryland Area Regional Commuter system. The locomotive's electrical drive technology is directly derived from the SNCF BB 36000 manufactured by Alstom.

A small class size, and reliability problems with correspondingly high per capita maintenance, and replacement costs caused Amtrak to seek service replacements for its fifteen units at the same time as the older EMD AEM7s after only a decade in service. Displaced units are being considered for push-pull use as a cheaper interim solution to a need for additional Acela trainsets.