i have several Providence & Worcester autoracks, 2 MTH and 2 Lionel. The MTH measure a little over 18" and the Lionel come in around 24".
Both are supposed to be scale representations of the real thing, so what accounts for the difference in length? Are they models of two different prototypes? Are the MTH cars based on older cars while the Lionel are newer? If this is the case would it be normal to find both cars in a consist?
They just look weird to me running together.