Engine, 4.1L V8, HT-4100

Standard 1982

Standard

Cadillac high technology V8; Wikipedia's Cadillac High Technology engine article gives LT8 as the HT-4100 option code and lists the Fleetwood Brougham through 1985, and its Fleetwood Brougham article dates the HT-4100 through 1985 (the articles count as one source); no sibling source read prints the code for this car

the standard HT-4100 (High Technology) V8, 135 hp; Wikipedia's High Technology engine article gives the option code LT8 to the HT-4100 and lists the DeVille among its applications for every year of this span, and its DeVille article calls the HT-4100 the standard engine of the 1985 sixth generation, continuing in 1986; the article's applications list ends the HT-4100 after 1987, and the 4.5L that replaced it for 1988 gives no code in any source read; both articles are Wikipedia, one source; decoderpo.com (T3, undated, no vehicle) reads LT8 as a 4.1L V8 engine, which agrees on the meaning only; the code is not listed in a Cadillac-specific factory page, so single-source

Cadillac high technology V8, the standard engine; Wikipedia's engine article gives LT8 as the HT-4100 option code and lists the DeVille for every year of this span, and its DeVille article dates the HT-4100 across this generation; the two articles count as one source; the sibling gnttype.org Buick table prints no Cadillac codes

Wikipedia's Cadillac High Technology engine article gives LT8 as the HT-4100's option code and lists the Eldorado, and its Eldorado article names the HT-4100 for this generation; the NICB Cadillac engine tables list a 4.1L V8 digital fuel injection engine (no RPO codes, so they do not name LT8; the VIN letter is not legible in the OCR text); no Buick or Oldsmobile E-body used this engine, so there is no sibling source

Wikipedia's Eldorado article names the HT-4100 V8 for 1986–1987 in the eleventh-generation infobox, and its Cadillac High Technology engine article gives LT8 as the HT-4100's option code and lists the Eldorado (the two articles are one source); no Buick or Oldsmobile E-body used this engine, so there is no sibling source

the HT-4100 (High Technology) V8; Wikipedia's High Technology engine article gives the option code LT8 to the HT-4100 and lists the Fleetwood among its applications for 1985–1987, and its Fleetwood article names the HT-4100 as the engine until it was replaced for 1988; the Wikipedia articles are one source, and the code is not printed in a Fleetwood-specific factory page; the DeVille, Eldorado and Seville share the engine (sibling and platform mates, corroborating the code only); decoderpo.com (T3, undated, no vehicle) reads LT8 as a 4.1L V8 engine, agreeing on the meaning only; single-source

Wikipedia's Seville article lists the LT8 HT4100 V8 through 1985 (135 horsepower), and its Cadillac High Technology engine article calls LT8 the HT-4100 option code and lists the Seville (the same source family, not independent); the NICB 1983 and 1984 Cadillac VIN tables print a 4.1L V8 DFI engine symbol without a code; no Seville-specific source prints the code

Wikipedia's engine table for this generation lists the LT8 HT4100 V8 at 130 hp for 1986–1987; its engine article (one source with the Seville article) lists the Seville under this engine; the Eldorado, Riviera and Toronado share the platform but no sibling source prints the code for these years