Dieselisation
conversion to diesel fuel in vehicles, esp. locomotives
Dieselisation (US: dieselization) is the process of equipping vehicles with a diesel engine or diesel engines.
It can involve replacing an internal combustion engine powered by petrol (US: gasoline) fuel with an engine powered by diesel fuel, as occurred on a large scale with trucks, buses, farm tractors, trains, and building construction machinery after World War II. Alternatively it can involve replacing the entire plant or vehicle with one that is diesel-powered; the term commonly describes the generational replacement between the 1930s to 1970s of railway steam locomotives with diesel locomotives, and associated facilities.
Water transport
The two-stroke diesel engine for marine applications was introduced in 1908 and remains in use today. It is the most efficient prime mover to date, models such as the Wärtsilä-Sulzer RTA96-C offer a thermal efficiency of 50% and over 100,000 horsepower. First steps towards conversions using diesel engines as means of propulsion (on smaller ships) were already undertaken by the 1920s. The market share of steam-powered ships ("steam ships") peaked around 1925 (a few sailing ships remained in service). By the early 1950s diesel engine-powered "motor ships" held over 50% of the market.
Rail transport
In rail transport, dieselisation refers to the replacement of the steam locomotive or electric locomotive with the diesel locomotive (usually the diesel-electric locomotive), a process which began in the 1930s and is now substantially complete around the world.
Advantages of diesel in rail transport
Weighing against the cost of, and inertia against, replacing the large investment that railways had in existing steam power were the dramatic increases in flexibility and efficiency with diesel. Diesels could and did have a significantly higher initial price per unit-horsepower delivered; however, their operating and support costs were much lower and unit availability between inspection repair and maintenance stops were much higher.
“Dieselisation” enters the record as conversion to diesel fuel in vehicles, esp. locomotives. Crown Archives preserves that source wording while asking what Dieselisation, conversion and diesel can confirm, complicate or overturn.
Why this record matters
“Dieselisation” is worth following because a concise public description often conceals a longer documentary argument. Here, Dieselisation, conversion and diesel provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 30, 2026. The linked authority identifier is Q5275033. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1908 and 1925.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Dieselisation”, its source revision and the description used here.
- Expand the search: follow Dieselisation primary sources, Dieselisation archive and Dieselisation research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Dieselisation”?
- Which institution is responsible for the underlying evidence?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Dieselisation” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.