Does anyone other than me notice this:
I have an MTH Premier SD40-2 that I was planning on doing an MU with a Williams SD45. After putting them on the track back-to-back, the Williams SD45 appears somewhat larger then the MTH SD40-2...in other words out of scale. These two engine, in real life, are very close in overall dimensions other than length...with the SD40-2 being a little longer.
I've noticed the same difference in scale when running the MPC series of Lionel diesel engines.