400 cu in Pontiac V8
E925322
The 400 cu in Pontiac V8 is a popular American V8 engine introduced in the mid-1960s, widely known for powering performance models like the GTO, Firebird, and Trans Am during the muscle car era.
All labels observed (1)
| Label | Occurrences |
|---|---|
| 400 cu in Pontiac V8 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T11411238 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: 400 cu in Pontiac V8 Context triple: [389 cu in Pontiac V8, successor, 400 cu in Pontiac V8]
-
A.
389 cu in Pontiac V8
The 389 cu in Pontiac V8 is a classic American overhead-valve V8 engine from the late 1950s and 1960s, best known for powering early Pontiac performance models and helping launch the muscle car era.
-
B.
Chevrolet 409 cubic inch V8
The Chevrolet 409 cubic inch V8 is a legendary early-1960s big-block engine famed for its high performance and association with Chevrolet’s muscle-era full-size cars.
-
C.
Ford flathead V8
The Ford flathead V8 is an early mass-produced V8 automobile engine introduced by Ford in 1932, renowned for its simple side-valve design and major influence on hot rodding and American automotive culture.
-
D.
Ford 385-series V8
The Ford 385-series V8 is a family of big-block overhead-valve engines produced by Ford from the late 1960s through the 1990s, widely used in high-performance muscle cars and heavy-duty trucks.
-
E.
4.2 L Windsor V8 engine
The 4.2 L Windsor V8 engine is a small-displacement variant of Ford’s Windsor V8 family, designed primarily for improved fuel economy in late-1970s and early-1980s passenger cars.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: 400 cu in Pontiac V8 Target entity description: The 400 cu in Pontiac V8 is a popular American V8 engine introduced in the mid-1960s, widely known for powering performance models like the GTO, Firebird, and Trans Am during the muscle car era.
-
A.
389 cu in Pontiac V8
The 389 cu in Pontiac V8 is a classic American overhead-valve V8 engine from the late 1950s and 1960s, best known for powering early Pontiac performance models and helping launch the muscle car era.
-
B.
Chevrolet 409 cubic inch V8
The Chevrolet 409 cubic inch V8 is a legendary early-1960s big-block engine famed for its high performance and association with Chevrolet’s muscle-era full-size cars.
-
C.
Ford flathead V8
The Ford flathead V8 is an early mass-produced V8 automobile engine introduced by Ford in 1932, renowned for its simple side-valve design and major influence on hot rodding and American automotive culture.
-
D.
Ford 385-series V8
The Ford 385-series V8 is a family of big-block overhead-valve engines produced by Ford from the late 1960s through the 1990s, widely used in high-performance muscle cars and heavy-duty trucks.
-
E.
4.2 L Windsor V8 engine
The 4.2 L Windsor V8 engine is a small-displacement variant of Ford’s Windsor V8 family, designed primarily for improved fuel economy in late-1970s and early-1980s passenger cars.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
V8 engine
ⓘ
automobile engine ⓘ internal combustion engine ⓘ |
| aspiration | naturally aspirated ⓘ |
| blockMaterial | cast iron ⓘ |
| bore | 4.12 inches ⓘ |
| compressionRatio | varied by year and application ⓘ |
| configuration | 90-degree V8 ⓘ |
| coolingSystem | water-cooled ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cylinders | 8 ⓘ |
| displacement |
400 cubic inches
ⓘ
6.6 liters ⓘ |
| emissionsEraDetuning | yes ⓘ |
| era | muscle car era ⓘ |
| family | Pontiac V8 engine family NERFINISHED ⓘ |
| fuelSystem |
2-barrel carburetor
ⓘ
4-barrel carburetor ⓘ |
| fuelType | gasoline ⓘ |
| headMaterial | cast iron ⓘ |
| inductionSystem | carbureted ⓘ |
| layout | front-engine ⓘ |
| manufacturer | Pontiac Motor Division NERFINISHED ⓘ |
| marketedDisplacement | 6.6 L ⓘ |
| notableFor |
high performance applications
ⓘ
strong low-end torque ⓘ |
| notableUse |
1970 Pontiac GTO
NERFINISHED
ⓘ
late-1960s Pontiac Firebird 400 ⓘ |
| parentCompany | General Motors ⓘ |
| performanceVariant |
Ram Air II
NERFINISHED
ⓘ
Ram Air III NERFINISHED ⓘ Ram Air IV NERFINISHED ⓘ Ram Air V (experimental) NERFINISHED ⓘ |
| powerOutput | varied by tune and model ⓘ |
| productionEnd | late 1970s ⓘ |
| productionStart | 1967 ⓘ |
| stroke | 3.75 inches ⓘ |
| successor | Pontiac 455 V8 (in some performance roles) NERFINISHED ⓘ |
| usedInModel |
Pontiac Bonneville
NERFINISHED
ⓘ
Pontiac Catalina NERFINISHED ⓘ Pontiac Firebird NERFINISHED ⓘ Pontiac Firebird Trans Am NERFINISHED ⓘ Pontiac GTO NERFINISHED ⓘ Pontiac Grand Prix NERFINISHED ⓘ Pontiac LeMans NERFINISHED ⓘ |
| valvesPerCylinder | 2 ⓘ |
| valvetrain | overhead valve ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: 400 cu in Pontiac V8 Description of subject: The 400 cu in Pontiac V8 is a popular American V8 engine introduced in the mid-1960s, widely known for powering performance models like the GTO, Firebird, and Trans Am during the muscle car era.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.