Tazuras is correct that the scale is a bit out, if you look at the transport's windows they're quite tiny, the ones on this would be ginormous, and also it would be several storeys, as one with a giant ceiling would be very innefficient
But then on the other hand, Eyvind is correct, it would look a bit ugly if scaled properly. But at the end of the day, we're playing an RP mod, which tries to stay close to Vanilla styling, and this isn't so much.