The P40 series was built in 1993, weighs 268,800 lbs and uses a GE 7FDL-16 diesel prime mover that develops 4000 hp. My thanks to Wikia Fandom for the information. Use of the head end power drops the horsepower at the rails by 700hp.
Videos
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Amtrak engines 816 & 110 flying by Yarmouth Junction with Downeaster 691 and 5 cars on February 25th of 2017. Video by John Erickson.
Amtrak 691 westbound at Falmouth (CPF 192) with AMTK 818 and 90220 on September 28th of 2019. Video by John Erickson.
AMTK 818 & 90220 taking 681 through Winnocks Neck Rd on October 4th of 2019. Video by John Erickson.