Bhai aap bilkul sahi bole. WAP5 jab chalta to toofan aur bhuchaal aajaata hai. P7 se P5 more expensive locomotive hai. P7 se P5 pahle production huva phir bhi P5 ki tulna P7 nahi kar sakta. Speed ke maamle mein WAP5 ka koi todd nahi hai. WAP7 bhi achha locomotive hai main to 3 phase locomotives ka fan hoon.