there are 3 types of trains.
let's start with the easily distinguishable one, the C651s.
all C651s are of a white exterior. very nice motor sound especially
when 1st carriage leaves station or when entering a station, the
3rd carriage enters and the sound is truly orgasmic. 
carriage numbers are of a X2XX sequence.
C751s. their carriage number are of a X3XX sequence. new new in
2001?
C151s are your first trains that served singapore in 1987
onwards... now refurbished(and having less seats and in 10,
standing area), the carriage numbers are X0XX and X1XX.
just listen to the motor sounds, can differentiate already.
thanks, sinicker and willischong, i understand which is which
already. i usually differentiate by the motor sounds they make
especially for the 2 older type of trains.(dont know if its just me
but i'd always felt more comfortable with the C151 sounds).
and usually i will be happy if i am able to catch the a C751 train
yes the C151 are refurbished already and the train even change
colour right(resembles C751 color in some parts?)?
C151s has a silver door frame from the inside and the outside of
the doors. In the door's inside, there're silver railings that run
down beside the rubber strips. The colours of the seats are red,
blue and green
pardon me but i thought C151 have orange instead of red
seats?
sorry to have gone totally out of topic
