1957 Pontiac Bonneville

Full-size performance powered by 1957 Pontiac Bonneville Strato-Streak V8 family.

Exact-year stock-presenting view retained for body, trim, glazing, lamp, bumper, and wheel context; restoration details remain specific to the photographed car.

Body Star Chief Custom convertible

Engine family 347-cid Strato-Streak V8

Output 315 gross hp

Wheelbase 124 inches

Reported production 630

Story

1957 Pontiac Bonneville

The 1957 Bonneville joined Pontiac performance with premium full-size equipment. This page keeps its body, engine, transmission, axle, chassis, trim, production, and identity evidence in one model-year record while separating every configuration path.

Engines and drivetrain

The 347-cubic-inch Strato-Streak V8 was offered in model-year-specific output and induction forms. Engine code, carburetion or fuel injection, transmission, axle ratio, cooling, exhaust, dates, and records must agree; added Tri-Power or fuel injection does not establish original delivery.

Chassis and cabin

The 124-inch-wheelbase chassis used power-assisted drum brakes and model-year suspension, steering, wheel, and tire equipment. Paint, brightwork, upholstery, instruments, and controls depended on body and selected equipment.

Identity

Begin with serial, body, trim, title, and ownership records. Reconcile the shell, drivetrain, axle, brakes, suspension, protected finish, cabin, and every dated component. Production totals describe the model family, not a survivor count or one car's authenticity.

**Exact-year stock-presenting view retained for body, trim, glazing, lamp, bumper, and wheel context; restoration details remain specific to the photographed car.**Rex Gray via Wikimedia Commons · CC BY 2.0

Price history

Values

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

Original Price

A verified original price is not yet available for this car.

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

Exact-year Bonneville engine bay showing the restored 347 fuel-injection installation and surrounding service hardware; finishes, hoses, wiring, and restoration details remain specific to the photographed car.JOHN LLOYD via Wikimedia Commons · CC BY 2.0

Strato-Streak 347 347 cu in; Rochester mechanical fuel injection; 315 gross hp · 1957 Bonneville convertible · engine assembly / specification
Rochester Ramjet fuel injection Mechanical fuel-injection unit, manifold, air system, linkage, and calibration · 1957 Bonneville 347 · carburetor / specification

Transmission

Factory transmission Four-speed Strato-Flight Hydra-Matic automatic

Options

Engines and Induction summarized from reviewed factory and marque references.Classic Muscle · Reference illustration

FUEL-INJECTION Rochester Ramjet fuel injection factory · performance · Core factory Bonneville equipment; unit, calibration, engine, and records must agree.
HYDRAMATIC Strato-Flight Hydra-Matic factory · comfort · Transmission, controls, and axle must match.
POWER-EQUIPMENT Power steering and brake assist factory · comfort · Hardware and serial-specific delivery require inspection.

Paint

**Exact-year side view showing the restored white finish, red side spear, brightwork, wheel covers, whitewalls, and black convertible top; finish and restoration remain specific to the photographed car.**GPS 56 via Wikimedia Commons · CC BY 2.0

PONTIAC-BLACK Raven Black factory · solid
PONTIAC-WHITE Kenya Ivory factory · solid
PONTIAC-RED Mandarin Red factory · solid
PONTIAC-BLUE Starlight Blue factory · solid
PONTIAC-GREEN Limefire Green factory · solid

Appearance

1957 Bonneville body, grille, lamp, and brightwork treatment factory · other
Bonneville and Pontiac identification factory · badge
Bonneville side trim and finish treatment factory · other
Bonneville wheel covers, wheels, and tires factory · wheel

Interior

Exact-year Bonneville convertible cabin showing the dashboard, controls, steering wheel, door trim, and front seat; accessory under-dash gauges, floor covering, condition, and restoration remain specific to the photographed car.GPS 56 via Wikimedia Commons · CC BY 2.0

Bonneville-specific bench seating and body-specific accommodation factory · seat
Pontiac instruments, speedometer, and engine-monitoring displays factory · gauge
Power-steering wheel and column controls factory · steering wheel
Trim-code-supported upholstery color, material, and pattern factory · upholstery
Hydra-Matic or manual, heater, radio, clock, and accessory controls by configuration factory · other

Chassis

Independent front suspension with coil springs Suspension · factory
Leaf-sprung live rear axle Suspension · factory
Bonneville springs, dampers, steering, and stabilizer equipment Suspension · factory
Hydraulic four-wheel drum brakes Brakes · factory
Power-assisted drum brakes Brakes · factory
Bonneville hypoid axle and ratio matched to Hydra-Matic Rear axle · factory
Individual housing, ratio, dates, and records require inspection Rear axle · factory

Production

Transmissions summarized from reviewed factory and marque references.Classic Muscle · Reference illustration

1957 Pontiac Bonneville Star Chief Custom convertibles total · 630 · reported

Authenticity

Rear Axle and Ratios summarized from reviewed factory and marque references.Classic Muscle · Reference illustration

Model-year identity 1957 Bonneville identity supported by serial, body, trim, engine, transmission, axle, title, and ownership evidence · VIN or serial plate, body or trim plate, chassis, title, build records, and ownership history · fraud detection
Engine and transmission Configuration-correct engine, induction, transmission, controls, stampings, castings, and dates · Engine, induction, gearbox, shifter, pedals, stamp pads, castings, dates, and records · numbers matching
Axle, brakes, and suspension Application-correct axle, ratio, brake system, steering, springs, links, and dampers · Axle housing and carrier, brakes, steering, suspension, dates, service records, and build evidence · date correctness
Paint, exterior trim, and cabin Plate- and record-supported finish, moldings, badges, wheels, upholstery, instruments, and controls · Body and trim plates, protected paint, upholstery, hardware, dashboard, and restoration records · trim correctness

Still Researching

production The reviewed public records do not provide an audited 1957 split by engine code, transmission, axle, paint, trim, options, plant, destination, or surviving cars.
paint colors Reviewed references establish representative factory colors but not a complete body, trim, stripe, special-order, plant, and build-date compatibility matrix.
interior Broad cabin equipment is documented, but the complete upholstery color, material, body, option, and production-date matrix is not publicly reconciled.
authenticity markers Public model references cannot prove one survivor's born-with shell, drivetrain, chassis components, paint, trim, options, or component dates.