The C751B trains used on the Circle and Marina lines are each made up of three cars, with each car measuring approximately 20 metres long. This means that a C751B train is approximately 60 metres long.
The C830 trains used on the Thomson-East Coast Line are each made up of four cars, with each car measuring approximately 23 metres long. This means that a C830 train is approximately 92 metres long.
In summary, the length of MRT trains in Singapore can vary from approximately 60 metres to approximately 138 metres, depending on the train type.