"Trains are fast."
How do you say "The train is early" in Japanese? Since 早い (early) and 速い (fast) are both spoken はやい, do you say it differently to make your point clear?
I looked this up. This seems to be spoken as きしゃ and means a steam driven train. I am not certain if this can be used as train in general, then you're right. If not, well, most frequently you will find electric trains, aka 電車, and maybe on some not electrified rails there might be a diesel train.