Story
1957 DeSoto Adventurer
For 1957, DeSoto remade the Adventurer around its new Forward Look body and Torsion-Aire chassis. The two-door Sportsman hardtop returned, and a convertible joined it for the first time. Both rode a 126-inch wheelbase and shared the same standard 345-horsepower powertrain. The National DeSoto Club reports 1,650 hardtops and 300 convertibles.
One horsepower per cubic inch
The Adventurer's Hemi used a 3.80-inch bore and stroke for 345 cubic inches, 9.25:1 compression, hemispherical chambers, and double rocker shafts. DeSoto rated it at 345 gross horsepower at 5,200 rpm and 355 lb-ft at 3,600 rpm. Two Carter WCFB four-barrels handled induction: 2635S in front and 2636S at the rear. Those positions, tags, linkage, intake, and dates matter when checking a restored engine.
Three-speed TorqueFlite
Every Adventurer used the three-speed TorqueFlite automatic with instrument-panel push buttons. Factory ratios were 2.45 in low, 1.45 in second, and 1.00 in drive. The standard semi-floating hypoid rear axle used 3.54 gearing with a 39/11 tooth count. The factory sheet lists several optional ratios, so a different ratio is possible, but only car-specific records and physical inspection can establish how one was built.
Torsion-Aire and power drums
The boxed 126-inch frame carried independent front suspension with non-parallel control arms and longitudinal torsion bars. At the rear, six-leaf semi-elliptic springs located the live axle. One-inch direct-acting shock absorbers were used front and rear. Vacuum-assisted 12-inch hydraulic drums handled braking, with a separate parking brake on the transmission output shaft. Disc brakes and modern hydraulic conversions are later changes unless clearly disclosed.
Hardtop and convertible
The hardtop and convertible are body choices within the same 1957 Adventurer family, not duplicate models. Both used quad headlamps, a low side spear, gold exterior hardware, dramatic fins, three-lens taillight towers, and exhaust outlets through the rear bumper. Accessory wire wheels appear on some restored cars, while gold-anodized full wheel covers and 8.50 x 14 whitewalls form the standard factory reference.
Black, white, and Adventurer Gold
The restricted palette consisted of Black, White, and Adventurer Gold Metallic. The marque club reports four arrangements: black with gold, white with gold, and the two reverse treatments. Factory refinishing records identify AAA Black, LLL White, and PPP Adventurer Gold Metallic with supplier formulas. A complete public placement-code table was not found, so the body tag, protected paint, and restoration file control claims about one car.
A gold-tone cabin
The six-passenger cabin used gold vinyl and tweed cloth, a textured instrument-panel insert, a sweeping 150-mph speedometer, and push-button transmission controls. Exact cars document power seats, power windows, Airtemp air conditioning, the Benrus steering-wheel watch, and the briefly advertised Highway Hi-Fi record player. Availability does not prove installation on another car; switches, wiring, controls, hardware, tags, and records must agree.
Identifying one
Start with the S-26 body, serial and body tags, title, and registry history. The Detroit serial range was shared with Fireflites, so it is not enough by itself. Reconcile the S26-A engine stamp, 345 internals, WCFB tags, TorqueFlite, axle, torsion bars, springs, brakes, paint, gold trim, cabin, dates, and ownership records. Scripts, gold paint, dual carburetors, or a Fireflite serial can all appear on a convincing recreation.
Price and market context
Reviewed references report original prices of $3,997 for the hardtop and $4,272 for the convertible. Dated auction results and a separately typed condition-guide value provide market context, but body style, restoration quality, equipment, condition, and provenance create large differences. These records describe their own subjects and are not an appraisal of another Adventurer.