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Compact performance

1976 Chevrolet Cosworth Vega

Compact performance powered by 1976 Cosworth Twin Cam 122.

Dark Green Metallic 1976 Cosworth Vega, front three-quarter view
Engine 122-cu-in DOHC four, 110 hp
Transmissions Four-speed; optional five-speed
Rear axle 3.73 or 4.10; Positraction optional
1976 colors Black plus eight midyear choices
1976 production 1,447 reported

Story

The 1976 Cosworth Vega kept the numbered twin-cam idea intact while making meaningful changes beneath and around it. Chevrolet retained the 122-cu-in aluminum four, Cosworth 16-valve head, Bendix electronic fuel injection, and 110-horsepower rating, then added an optional Borg-Warner five-speed overdrive and a broader color and interior palette.

The standard M20 Saginaw four-speed continued with a 3.73 axle. Ordering M75 brought a dogleg T-50 five-speed with 0.80 overdrive and a 4.10 axle; Positraction remained optional on either path. A wider transmission tunnel and bolt-in shifter plates identify the second-year floorpan. Softer springs raised the ride an inch, the adjustable Panhard bar moved behind the axle, and larger rear drums improved the manual disc-drum brake system.

Black and gold remained available, but eight more exterior colors joined during the model year. Grained vinyl replaced the 1975 perforated material, Firethorn and Buckskin cabin colors joined black, and patterned sport cloth became an $18 option. Revised grille, emblems, taillamps, wheels, wipers, and other small details help distinguish the years.

The registry reports 1,447 cars for 1976. A gold dash plaque and stripes are useful history, not proof by themselves. The VIN's O engine code, Z09 paperwork, body tag, engine and EFI numbers, transmission and axle evidence, paint and trim, plaque sequence, and ownership records must agree before an individual car is described as authentic.

Dark Green Metallic 1976 Cosworth Vega, rear three-quarter viewBUTTON74 via Wikimedia Commons · CC BY-SA 4.0

Price history

Values

Nominal dollars from original price sheets, auction archives, and approved value references.

Market Observations

  • Auction sale $27,000

    Jan 22, 2026 · Bring a Trailer

    Documented 14k-mile black five-speed survivor with Positraction, build sheet, initial invoice, retained EFI, and disclosed paint crazing · survivor · excellent Vehicle-specific completed result, not a generic model value.
  • Auction sale $18,000

    Sep 29, 2025 · Cars & Bids

    Cosworth no. 2,842, chassis 1V7706U198736, with 46,700 miles displayed, five-speed, limited-slip differential, build sheet, records, and CVOA documentation · modified · unknown Completed winning bid before buyer fees. The car had a custom exhaust, repaint work on the roof panel and tailgate, cylinder-head service, and substantial chassis and brake replacement work. EFI retention, mileage, broader component originality, corrosion, and condition grade are not independently established.
  • Auction sale $36,300

    Jan 11, 2024 · Mecum Kissimmee

    Unrestored black four-speed, chassis 1V7706U182958, with 299 miles displayed, Positraction, window sticker, build-sheet copy, manuals, and delivery records · survivor · excellent Venue-published completed result; hammer-versus-fee basis is not disclosed. Mecum reports original condition and very low mileage, but mileage, complete component originality, document completeness, and the locked condition grade remain listing-based rather than independently verified.
  • High bid $14,250

    Apr 6, 2018 · Bring a Trailer

    Dark Metallic Blue four-speed, chassis 1V7706U22048, with 3,200 miles displayed, retained EFI, build sheet, and documented cosmetic and mechanical refurbishment · restored · unknown Reserve-not-met high bid, not a completed sale. The car received paint correction, interior re-dye and carpet work, engine seals, axle and suspension refinishing, brake work, replacement shocks, and other service. Mileage, broader component originality, corrosion, and condition grade are not independently established.

Values move with paperwork, originality, options, condition, venue, and body style. High bids and guide values are labeled separately from completed sales.

Reference records

Options, Colors & Components

Source-backed details for trim, chassis, production, and authenticity.

Engine Details

1976 Cosworth Twin Cam engine and Bendix EFIVegavairbob / Robert Spinello via Wikimedia Commons · CC BY-SA 3.0
  • Cosworth Twin Cam 122 3.501 x 3.160 inches, 8.0:1 compression, 110 hp and 107 lb-ft · standard and exclusive to the 1976 Cosworth Vega · engine assembly / specification
  • Cosworth aluminum cylinder head dual overhead camshafts and four valves per cylinder · belt-driven cam carrier on the de-stroked Vega aluminum block · cylinder head / specification
  • 1976 VIN engine code O · fifth VIN position on an individual 1976 Cosworth Vega · other / assembly code

Transmission

  • Factory transmission M20 Saginaw four-speed manual
  • Factory transmission M75 Borg-Warner T-50 five-speed manual

Options

Cosworth Twin Cam 122 reference for the 1976 Chevrolet Cosworth VegaClassic Muscle · Reference illustration

Production

Chevrolet 1976 Cosworth Vega period press photographChevrolet via Wikimedia Commons · Public domain
Four or Five Speeds reference for the 1976 Chevrolet Cosworth VegaClassic Muscle · Reference illustration

Authenticity

Transmission-Specific Axles reference for the 1976 Chevrolet Cosworth VegaClassic Muscle · Reference illustration
  • Model identity 1V77O6 VIN pattern, 1HV77 body, Z09 paperwork, and serialized dash plaque agree · VIN, body tag, window sticker, invoice, build sheet, dashboard, and registry history · fraud detection
  • Engine identity VIN-code O engine, component numbers, production/date code, vehicle VIN stamp, EFI, twin-cam head, and header agree · VIN, block, bellhousing flange, head, cam carrier, EFI hardware, exhaust, and records · numbers matching
  • Transmission and axle M20 and 3.73 or M75 T-50 and 4.10 evidence agree; G81 requires separate proof · Transmission tag and stamp, shifter opening, tunnel plate, axle code, ratio, dates, and paperwork · date correctness
  • Paint, trim, and cabin Body-tag color and trim, gold graphics, 1976 body details, plaque, wheels, and hidden finishes agree · Body tag, hidden paint, graphics, grille, taillamps, wheels, cabin, plaque, fasteners, and period photos · trim correctness

Still Researching

  • production Registry pages report 1,447 and approximately 1,446, but no Chevrolet package-production ledger was reviewed.
  • interior A documented 1976 Cosworth Vega establishes code 19D for the optional black sport-cloth and vinyl interior. Registry records establish black, Firethorn, and Buckskin color families with vinyl or sport-cloth paths, but the reviewed sources do not map exact codes for the remaining combinations. Chevrolet's dated Heritage sheet explicitly excludes Cosworth from trim code 1776.
  • authenticity markers The model record cannot establish one car's original engine, EFI, transmission, axle, paint, trim, plaque, or ownership history.

Codes & names

Names & Engine Codes

Common names and codes are grouped so LS6 references point to the same engine, not separate pages.

Second-Year Chassis reference for the 1976 Chevrolet Cosworth VegaClassic Muscle · Reference illustration
1976 Cosworth Twin Cam 1976 Cosworth Twin Cam 122
1976 LY3 engine 1976 Cosworth Twin Cam 122
1976 VIN-code O engine 1976 Cosworth Twin Cam 122

Photo and video gallery

Gallery

5 photos and videos

Sources & Documentation

Reader contributions

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