Hybrid LHB's are given limit til 130kph though they can handle more than too!!!
as RSDO tested it, it touched mostly til 145kph!!!
but the problem is with the sleeper coaches, where the wind gushes in n makes the train speed decrease.
so the limit of them are 130kph as of now!!!
n...
more... yes, they can travel at 130kph for a stretch of given time in the route without any hassle as the windows are closed always!! :)
if its a AC Duronto, then it can go for its high MPS at 140kph too!!!!