Thomas the Tank Engine Wikia

Sidney (Diesel)

6,958pages on
this wiki
Add New Page
Add New Page Comments5
This article is about the diesel engine. You may be looking for the steam engine.
"It's a shame you're not an elephant, Sidney."
"An elephant? Huh? Why's that, Whiff?"
"They say that elephants never forget!
— Whiff and Sidney, Sidney Sings, twentieth season


  • Class: BR Class 08
  • Designer: British Railways
  • Builder: Crewe, Darlington, Derby, Doncaster, or Horwich Works
  • Built: sometime between 1952 and 1962
  • Configuration: 0-6-0DM
  • Top Speed: 20 mph

Sidney, nicknamed "Sid", is a dark blue diesel shunter.


Sidney was one of the diesels who laughed at Percy's joke when the tank engine first arrived at the Sodor Dieselworks. He only appeared very briefly on a hoist with no wheels.

He was still there in the seventeenth season and was often referred to as a Christmas decoration by the diesels, literally being used as one by Diesel 10 as well. Percy asked how long Sidney had been left up on the hoist and found out from Norman that it had been two years. Percy gave Sidney a new set of wheels as a Christmas present, and Sidney is now a really useful engine again.

In the eighteenth season, he, along with Diesel, Den, and Dart hid from Paxton, who then found them again at the end of the day.

In the twentieth season, he was sent by Sir Topham Hatt to collect new wheels for Percy. Sidney was worried he would forget his job and let Percy down, but Thomas, Annie, and Clarabel suggested he sing a song to remind himself what to do. Sidney thought this was a great idea, and sang his song, until he stopped at Wellsworth to talk with Gordon. After talking with him, Sidney completely forgot the words to his song, and, while trying to remember what he was supposed to do, ended up running all around Sodor, first to Whiff's Waste Dump, then to the Animal Park. Eventually, he decided that it would be best to go back to Knapford to confess to Sir Topham Hatt that he had failed to complete his special job, but upon arriving, he found a crowd of passengers waiting impatiently for their train to Brendam Docks. Thinking that taking the passengers was his special, Sidney found some coaches and took them to the Docks, where Sir Topham Hatt was waiting by Percy's new wheels, grumbling about the forgetful diesel's lateness. When Sidney arrived, the passengers praised him, and Sir Topham Hatt reminded him that he still had to take Percy's wheels to the Steamworks. Sidney, who thought he had already completed his special, gladly accepted the supposed second special, and took the wheels to the Steamworks, where Percy was waiting.


Sidney is a bit of a forgetful engine. He starts his day at one location and ends up at another, not remembering how he got there. When it was his turn for repairs at the Dieselworks, he was hoisted up and had his undercarriage removed. Being patient, Sidney was happy to wait, and wait, and wait. He sat there happy to pass the time with any engine that happened to be visiting. Two years later, he still had no wheels, so Percy helped him at Christmas to get a new set of wheels and now he is back on track.


Sidney is a BR Class 08 diesel shunter. Diesel, the Diesel Shunter, Paxton, Splatter, Dodge, 'Arry, and Bert and The Great Railway Show Diesels are also members of this class.


Sidney is painted navy blue with yellow lining and a warning panel under his face. His traction rods are painted red.


Television series


Voice Actors


  • In some merchandising and books, Sidney is sometimes misspelt as "Sydney".
  • Sidney's horn is actually Paxton's at a higher pitch.
  • Despite Sidney's nickname being "Sid", he has been consistently referred to by his full name rather than his nickname. He shares this dilemma with Norman and Paxton.


  • Percy: Sidney, how long have you been up there?
  • Sidney: Erm, not very long Percy. I mean.. er.. I forget.
  • Norman: It's been about two years.
  • Percy: Two years? That's a very long time.
  • Sidney: Yeah, I'm waiting for my wheels. I think the order's been misplaced.

- Percy, Sidney, and Norman discussing how long Sidney has been without wheels, The Missing Christmas Decorations, seventeenth season.


  • Take-n-Play
  • Wooden Railway (normal and Holiday Special version, both discontinued, Sodor Aquarium version, coming soon)
  • Minis (Classic, Chillin' , DC Super Friends and Sweets)


Merchandise Gallery

See also

Category:Images of Sidney

North Western Railway
ThomasEdwardHenryGordonJamesPercyTobyDuckDonald and DouglasOliverBarryThe Austerity EngineThe Red EnginesDaisyBoCoBearThe Works DieselPip and EmmaPeel Godred Engines
HarveyEmilyFergusArthurMurdochMollyNevilleRosieWhiffBillyStanleyHankFloraVictorCharlieBash and DashFerdinandScruffBellePorterGlynnRyanDerekDiesel 10'Arry and BertSaltyDennisDenDartSidneyPaxtonNormanPhilipFlynnWinstonStafford

Also on Fandom

Random Wiki