“Buzzin’ Dozen” is an informal nickname most closely associated with Detroit Diesel’s 12V-71, a V12 in the 71 Series. “Dozen” refers to its twelve cylinders; “buzzin’” is commonly explained by the engine’s distinctive sound and fast-running character. The exact person and date behind the nickname have not been established.
Which Detroit Diesel engine is the “Buzzin’ Dozen”?
The clearest specific association is the Detroit Diesel 12V-71. A specialist guide published by Diesel Pro Power on March 19, 2025, identifies “Buzzin’ Dozen” as a nickname for the V12-71, connecting it with the engine’s cylinder count and fast-revving nature: Diesel Pro Power’s guide to Detroit Diesel names and slang.
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Usage is not entirely limited to that model. The collaborative Wiktionary entry also applies the term to the Detroit Diesel 12V92 and 12V149. That broader listing is evidence of wider slang usage, but the 12V-71 is the strongest specific identification in the specialist material: Wiktionary’s “buzzin’ dozen” entry.
What does “Buzzin’ Dozen” mean?
“Dozen” means twelve cylinders
The “dozen” part is straightforward: the 12V-71 is a V12, so it has twelve cylinders. The model code, rather than the nickname, is the precise way to identify the engine.
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“Buzzin’” evokes its sound and operating character
The commonly given explanation connects “buzzin’” to the engine’s sound and its fast-running character. A February 2007 reader-submitted note about the 12V71TT offers a more specific account: it attributes the sound to the firing activity of a two-stroke V12 running at high speed. That is an individual explanation, not a verified Detroit Diesel statement or an established naming record: The Legend-News reader-submitted note.
Is “Buzzin’ Dozen” an official Detroit Diesel name?
No reviewed source establishes it as a formal model designation or an official name defined by Detroit Diesel. It is slang; “12V-71” is the model code to use when referring to the engine. A Steam Community forum post from November 8, 2019, captures the enthusiast phrasing “A.K.A., the ‘Buzzin’ Dozen’?” in a question about the DD 12V-71, but a forum example does not establish official terminology or a naming origin: Steam Community discussion.
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When did the nickname originate?
The available sources do not identify who coined “Buzzin’ Dozen” or when it first appeared. The wordplay—twelve cylinders and a buzzing sound—is a plausible, commonly repeated interpretation, but it should not be presented as a documented origin story. None of the cited material supplies a verified original Detroit Diesel statement defining the nickname.
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What is the 12V-71, beyond the nickname?
The 12V-71 belongs to Detroit Diesel’s 71 Series, a family used in marine, bus, and heavy-truck applications, according to the Diesel Pro Power guide. A 2019 enthusiast forum post describes the 12V-71 as a two-stroke 14-liter V12, but that post is not an authoritative specification sheet and its linked period brochure was not verified: Steam Community discussion.
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Specific horsepower, torque, or speed figures should not be inferred from the nickname. Ratings depend on configuration, and the cited material does not provide an inspected, authoritative specification sheet for a particular 12V-71 variant.
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