Chevrolet 409 cubic inch V8
E528695
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Chevrolet 409 cubic inch V8 canonical | 1 |
| Chevrolet W-series big-block | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5576502 — 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: Chevrolet 409 cubic inch V8 Context triple: [Impala SS 409 (early 1960s), hasEngine, Chevrolet 409 cubic inch V8]
-
A.
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.
-
B.
Packard V-1650
The Packard V-1650 is an American-built version of the Rolls-Royce Merlin V-12 aircraft engine, produced under license by Packard and widely used in World War II fighters such as the P-51 Mustang.
-
C.
Chevrolet Series C Classic Six
The Chevrolet Series C Classic Six was the first production automobile from the Chevrolet Motor Company, a large, powerful touring car introduced in 1911 that helped establish the brand in the early American automotive market.
-
D.
Oldsmobile 442
The Oldsmobile 442 is a classic American muscle car from the 1960s and 1970s, renowned for its high performance, powerful V8 engines, and prominent role in the golden age of Detroit performance cars.
-
E.
Ford GAF V-8 gasoline engine
The Ford GAF V-8 gasoline engine was a powerful American tank engine used to propel the World War II–era M26 Pershing heavy tank.
- 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: Chevrolet 409 cubic inch V8 Target entity description: 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.
-
A.
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.
-
B.
Packard V-1650
The Packard V-1650 is an American-built version of the Rolls-Royce Merlin V-12 aircraft engine, produced under license by Packard and widely used in World War II fighters such as the P-51 Mustang.
-
C.
Chevrolet Series C Classic Six
The Chevrolet Series C Classic Six was the first production automobile from the Chevrolet Motor Company, a large, powerful touring car introduced in 1911 that helped establish the brand in the early American automotive market.
-
D.
Oldsmobile 442
The Oldsmobile 442 is a classic American muscle car from the 1960s and 1970s, renowned for its high performance, powerful V8 engines, and prominent role in the golden age of Detroit performance cars.
-
E.
Ford GAF V-8 gasoline engine
The Ford GAF V-8 gasoline engine was a powerful American tank engine used to propel the World War II–era M26 Pershing heavy tank.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Chevrolet big-block engine
ⓘ
V8 engine ⓘ automobile engine ⓘ |
| aspiration | naturally aspirated ⓘ |
| blockMaterial | cast iron ⓘ |
| bore | 4.3125 inches ⓘ |
| compressionRatio |
10.5:1
ⓘ
11.0:1 ⓘ |
| configuration | 90-degree V8 ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| culturalAssociation |
American muscle car era
ⓘ
early 1960s performance cars ⓘ |
| cylinders | 8 ⓘ |
| displacement |
409 cubic inches
ⓘ
6.7 liters ⓘ |
| engineSeries | Chevrolet big-block NERFINISHED ⓘ |
| era | early 1960s ⓘ |
| family | Chevrolet W-series engine NERFINISHED ⓘ |
| featuredInSong | "409" by The Beach Boys ⓘ |
| fuelSystem | carburetor ⓘ |
| fuelType | gasoline ⓘ |
| headMaterial | cast iron ⓘ |
| manufacturer |
Chevrolet
NERFINISHED
ⓘ
General Motors ⓘ |
| marketSegment | high-performance ⓘ |
| motorsportUse |
NASCAR
NERFINISHED
ⓘ
drag racing ⓘ |
| nickname | 409 ⓘ |
| notableCarburetion |
dual 4-barrel carburetors
ⓘ
single 4-barrel carburetor ⓘ |
| notableFeature |
W-shaped combustion chamber in block
ⓘ
high-performance factory ratings ⓘ |
| notableModelApplication |
Chevrolet Bel Air
NERFINISHED
ⓘ
Chevrolet Biscayne NERFINISHED ⓘ Chevrolet Impala NERFINISHED ⓘ Chevrolet full-size cars ⓘ |
| powerOutput |
360 horsepower
ⓘ
380 horsepower ⓘ 400 horsepower ⓘ 409 horsepower ⓘ |
| predecessor | Chevrolet 348 cubic inch V8 NERFINISHED ⓘ |
| productionEnd | 1965 ⓘ |
| productionStart | 1961 ⓘ |
| stroke | 3.50 inches ⓘ |
| successor | Chevrolet 396 cubic inch V8 NERFINISHED ⓘ |
| torqueOutput |
420 lb-ft
ⓘ
425 lb-ft ⓘ 425+ lb-ft ⓘ |
| 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: Chevrolet 409 cubic inch V8 Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Chevrolet W-series big-block