Houses a large and multi-cylinder engine.

Releases carbon emissions such as carbon dioxide and methane.

Causes significant sounds from engine.

The engine produces the power via combustion and hauls the passengers/cargo carriages.

Relies on overhead electric lines as well.

Essentially a locomotive that doesn't have an engine but carries multiple passenger/cargo coaches.

Slower acceleration and deceleration.

All of the traction motors are in one end and not spread throughout the train.

It uses traction motors that are underneath the carriages and throughout the train.

Uses overhead cables to gain power and the train propels itself.

Doesn't release any harmful pollutants.

Faster acceleration and deceleration.