Engine Summary
- Manufacturer
- Chevrolet
- Family
- Chevrolet Vega aluminum four-cylinder
- Displacement
- 122 cubic inches
Also Known As
1976 Cosworth Twin Cam1976 LY3 engine1976 VIN-code O engine
Engine profile
1976 Chevrolet Cosworth 122 DOHC four
Chevrolet Vega aluminum four-cylinder · 122 cubic inches · Chevrolet
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
Cosworth aluminum cylinder head
- Value
- dual overhead camshafts and four valves per cylinder
- Application
- belt-driven cam carrier on the de-stroked Vega aluminum block
- Type
- cylinder head / specification
- Car pages
- 1976 Chevrolet Cosworth Vega
Sources: 1976 Chevrolet Vega MVMA Specifications , 1976 Cosworth Vega engine with Bendix electronic fuel injection
Cosworth Twin Cam 122
- Value
- 3.501 x 3.160 inches, 8.0:1 compression, 110 hp and 107 lb-ft
- Application
- standard and exclusive to the 1976 Cosworth Vega
- Type
- engine assembly / specification
- Car pages
- 1976 Chevrolet Cosworth Vega
Sources: 1975-76 Cosworth Vega buyer's guide , 1976 Chevrolet Vega MVMA Specifications
1976 VIN engine code
- Value
- O
- Application
- fifth VIN position on an individual 1976 Cosworth Vega
- Type
- other / assembly code
- Car pages
- 1976 Chevrolet Cosworth Vega
Sources: 14k-mile 1976 Chevrolet Cosworth Vega five-speed sold January 22, 2026 , Cosworth Vega VIN decoder
Cars Using This Engine
1 linked car page.
two-door hatchback coupe
1976 Chevrolet Cosworth Vega
122-cu-in DOHC four, 110 hp