Four O'Clock Factoid is a daily feature on Track Twenty-Nine helping to get you through the workday with a bit of useless knowledge.
The GE Genesis is currently the workhorse of the Amtrak locomotive fleet. Units are also in use on Via Rail Canada, Metro-North, and NJ Transit. The Genesis locomotives were built between 1992 and 2001 and are more efficient than their predecessor the F40PH, using 22% less fuel and producing 25% more power. The first variant of the locomotive, the P40DC is capable of traveling at 103 mph, while the newer variants, the P42DC and the P32AC-DM can make it up to 110 mph. The P32 is used on routes operating out of New York-Penn Station and on Metro-North (out of Grand Central) because it is also able to pull power from a third rail in tunnels around New York City.