- A steam engine is huge and heavy. ...
- Steam engine has low efficiency.
- Steam engine does not start at once.
- Before a steam engine can start, one has to build a coal fire to get steam which takes a long time.
Diesel and electric engines have replaced the steam engines.
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Towards the end of the steam era, a longstanding British emphasis on speed culminated in a record, still unbroken, of 126 miles per hour (203 kilometres per hour) by LNER Class A4 4468 Mallard.
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