The HHP-8 (High Horse Power 8000) is an electric locomtive built by a consortium of Bombardier Transportation and Alstom. The HHP-8s are currently used by operators Amtrak, who have 15 units, and Maryland Area Regional Commuter system (MARC) who have 6 units.

Due to the high maintenance costs and the low unit volume, Amtrak began replacing the HHP-8s with ACS-64 locomtives after only a decade in service.

The HHP-8s have a 6 MJ crash energy absorbance structure; the body is stainless steel. The electrical traction system is directly derived from the system used on Alstom's BB 36000 Astride locomotives; this includes four 1.5MW three phase asynchronous traction motors powered by GTO based inverters, with one inverter per motor; the electric system also allows regenerative and rheostatic braking. The locomotives were designed for up to 135 mph operation but are actually limited in service to FRA Tier 1 standards, operating up to 125 mph.