Right, all the photographic exploded views on Lionel's website show a small, flat can motor similar to what would be used in an HO diesel. Probably made by Igarachi. No doubt the Mabuchi RS-385 favored by Frank Timko is more powerful than that!
Fred, Lionel upgraded the motor in its Baby Berk, that might be what you're thinking of. The motor is the heart of a loco, not a good place to cut corners. Maybe they'll eventually upgrade the Hogwarts and train-set 0-8-0's.