Although, of much greater use to Amtrak, would be the ALP-45DPs.
That's the dual-mode (overhead, rather than third-rail) locomotive that NJT & AMT (in Montreal) have ordered, right?
Yes. Its an evolution of the ALP-46. The P32ACDM is basically a diesel motor with a shoe that can directly power the traction motors. I'm simplifying this incredibly, but you get the idea. If you had to call it either a diesel or an electric, diesel would be the more accurate description.
The ALP-45DP is something else entirely. It is, at its heart, an electric engine. Its motors are there to excite its electric power arrays. According to Bombardier, with 5 cars or less, it should be able to hit 125 mph in diesel mode. More importantly, though, it can do 100 in diesel mode with a full load, and it can hit 125 under the wire regardless. Its an engine that could realistically replace every motor in the Amtrak fleet, be used absolutely anywhere, and be ready to take advantage of any and all future electrification programs.
At least that's what it should be able to do on paper. I want to see how reliable it is. Perhaps Amtrak is wondering the same thing.