1931–1932 Dodge DH Six Convertible Coupe: 114-Inch Wheelbase and Rumble Seat

Dodge built the DH Six around a 211.5-cubic-inch L-head engine rated at 68 horsepower and installed it in a separate-frame chassis with a 114-inch wheelbase. The Convertible Coupe combined that drivetrain with a folding top, two-door open body and rear rumble seat, giving Dodge buyers weather protection without surrendering the sporting proportions of an open car.

The DH designation belongs primarily to Dodge's 1931 model program, although surviving cars are sometimes registered or advertised as 1932 examples because manufacture, retail sale and initial registration did not always occur in the same calendar year. That distinction matters when researching a chassis, ordering parts or presenting a car for marque judging.

Best known for combining Dodge's established hydraulic-brake chassis with a compact open body and its then-current six-cylinder engine, the DH Convertible Coupe is one of the scarcer and more visually expressive survivors from the company's early Chrysler-controlled period.

Collectors still value the model for reasons that extend beyond rarity. The long hood, upright radiator shell, separate headlamps, running boards, rear-mounted spare and neatly folded top capture the final phase of essentially square-bodied Dodge styling before the lower, more streamlined forms of the middle 1930s took hold.

Quick Facts

The following reference points establish the Convertible Coupe's place within the DH family. Exact body-style production totals are not consistently documented in surviving published records, so no unsupported quantity is assigned to the open car.

The apparent 1931–1932 span should not be interpreted as two wholly separate DH generations. A title date alone cannot establish when a particular car was assembled, and owners should correlate the serial plate, engine number, body evidence and surviving paperwork before describing it as a specific model-year example.

Why the DH Convertible Coupe Matters

Open cars were losing ground to closed bodies by the early 1930s. Steel-roof sedans and coupes offered better security, quieter cabins and greater usefulness in poor weather, while mass production reduced their price disadvantage. A Convertible Coupe therefore represented a deliberate purchase rather than the default economical choice it might have been a decade earlier.

Dodge also entered 1931 with a broader mechanical range. The DG Eight gave the marque an eight-cylinder offering, while the DH retained a six for buyers who favored lower purchase and operating costs. The Convertible Coupe expressed that practical six-cylinder program in one of its least utilitarian bodies.

Its significance today rests on that combination. The engine and chassis are recognizably conventional Dodge engineering, but the open body, rumble-seat arrangement and smaller survival pool make correct examples much harder to replace than sedans. Restoration decisions involving the body tub, top hardware and rear deck can therefore have a disproportionate effect on authenticity and value.

Historical Context and Development

Dodge After the Chrysler Acquisition

Chrysler Corporation acquired Dodge Brothers in 1928, bringing a well-established manufacturing operation and dealer network into Walter P. Chrysler's expanding group. By the time the DH appeared, Dodge retained its own name and product identity, but engineering, purchasing and corporate planning increasingly reflected Chrysler control.

The market into which the DH arrived was exceptionally harsh. Vehicle demand contracted sharply after the 1929 stock-market crash, and manufacturers had to offer credible durability and equipment without allowing costs to outrun buyers' reduced budgets. Dodge's existing reputation for sturdy construction remained useful, but the company also faced intense price and specification pressure.

Competitors and Design Direction

The Chevrolet Independence offered six-cylinder power to a broad audience in 1931, while Ford continued with the four-cylinder Model A before the V-8's arrival for 1932. Plymouth competed at a lower price within Chrysler Corporation, and other medium-price makes, including Essex, Pontiac and Studebaker, pursued many of the same customers.

The DH's appearance followed established American practice: a near-vertical radiator, long louvered hood, separate fenders, full running boards and headlights carried between the fenders. On the Convertible Coupe, the low fabric roof and short passenger compartment made the hood appear longer than it did on the sedan. Opening the rumble-seat lid transformed the tapered rear deck into occasional accommodation, although access required stepping onto the rear fender pad.

There was no homologation requirement or factory racing program behind the DH Convertible Coupe. Its engineering priorities were road durability, tractable low-speed operation and serviceability, not competition eligibility. Any competition history attached to an individual car should be supported by contemporary records rather than inferred from the open body.

Engine and Drivetrain

The DH used a cast-iron, side-valve six with a 3.25-inch bore and 4.25-inch stroke. Those dimensions produce 211.5 cubic inches, or approximately 3.47 liters. Factory-era listings generally rate the engine at 68 horsepower, a useful figure for comparing Dodge models but not directly comparable with later net-horsepower standards.

Its L-head arrangement placed the valves in the cylinder block beside the bores, allowing a simple cylinder head without rocker arms or an overhead camshaft. A single carburetor supplied the engine, while a battery-and-coil ignition system and distributor fired the six cylinders. Water-pump cooling, a belt-driven fan and pressure-fed lubrication reflected normal Dodge practice for a car expected to cover long distances at modest engine speed.

Published references do not consistently provide torque, compression ratio or a factory redline for the DH in a form suitable for direct comparison. Those values are consequently omitted rather than reconstructed from later engines or modern estimates.

The documented core dimensions and output are summarized below. Carburetor and electrical-equipment manufacturers can differ according to production date, service replacement and export specification, so component brands should be checked against the car's build evidence.

A long stroke helped the engine pull at the low rotational speeds typical of early 1930s traffic. It was not designed to be held at modern highway rpm for extended periods. Correct axle gearing, tire diameter, ignition timing and cooling-system condition all determine whether a restored car feels relaxed or strained.

The floor-shift transmission demands more deliberate operation than a modern synchronized gearbox. A patient pause between shifts, and double-declutching where necessary, reduce gear clash. A worn clutch linkage or dragging clutch can easily be mistaken for a defective transmission.

Chassis, Suspension and Braking

The Convertible Coupe used body-on-frame construction, with its body attached to a conventional steel chassis. Open bodies lack the roof structure of a sedan, so sill condition, door alignment and the integrity of the cowl and rear body mounts are especially important. Wood was still used in portions of many bodies and trim assemblies of the period, even where major exterior panels were steel.

Rigid axles and semi-elliptic leaf springs served at both ends. This arrangement was durable and familiar to contemporary repair shops, but it gave each wheel little independence from disturbances at the opposite side of the axle. Lever-type hydraulic shock absorbers controlled spring motion, subject to specification and surviving equipment.

Dodge had adopted four-wheel hydraulic brakes well before the DH. The system used internal-expanding drums and offered a substantial practical advantage over the mechanically operated brakes still found on some contemporaries. Hydraulic brakes are only as good as their cylinders, hoses, lines, shoe arc and adjustment, all of which require close attention after a long period of storage.

The chassis table concentrates on dimensions and hardware that help distinguish a correct DH-based restoration. Wheel and tire equipment may have changed during a car's service life, making factory photographs, sales literature and physical evidence especially useful.

Correct ride height depends on spring arch and the proper tire diameter. Sagging rear springs spoil the deck line, alter axle geometry and can make an otherwise accurate restoration look heavy over the rear wheels. Oversized modern tires similarly change steering effort and the visual relationship between the fenders and wheels.

Driving Experience and Handling Dynamics

A properly sorted DH Six should start without prolonged cranking, settle into a low mechanical idle and pull away on modest throttle. The long-stroke engine delivers its useful work at low speed. Throttle response is measured rather than sharp, and smooth progress depends more on preserving momentum than extending each gear.

Manual steering is heaviest while parking and lightens once the narrow tires begin to roll. The large steering wheel supplies leverage, but accumulated wear in the steering box, kingpins, tie-rod ends and spring shackles can add free play. A healthy chassis should track predictably on a period-style road surface, although crosswinds, road crown and longitudinal grooves remain more noticeable than in a later independent-front-suspension car.

The leaf-sprung axles produce visible body movement over undulating roads. Functional shock absorbers matter: without them, the springs continue to oscillate after a bump and the open body can shake through the steering column and windshield frame. With correct damping, the car feels deliberate and flexible rather than uncontrolled.

Brake effort is substantial by modern standards, but a properly rebuilt hydraulic system should give progressive deceleration without pulling. The narrow contact patches and tall body define the limit long before engine output does. The rewarding technique is to brake early, shift cleanly and let the engine's low-speed pull carry the car away from a bend.

Identification and Originality

Serial, Engine and Body Evidence

The DH code is the central series identifier. These cars predate the standardized 17-character vehicle identification number, so referring to every number as a VIN can obscure what the evidence actually represents. A purchaser should locate the serial plate, record its stamping exactly, photograph the engine number and inspect any surviving body-maker or body-number tag before restoration work begins.

Serial-number location and range should be checked against a recognized Dodge reference for the relevant assembly plant. It is unwise to decode a partially legible plate from an online advertisement alone. Repainted tags, modern fasteners, inconsistent typefaces or stampings that do not agree with the paperwork require further investigation, although a replaced tag does not by itself prove fraudulent intent.

The modern phrase matching numbers must be used carefully. On an early Dodge, the meaningful question is whether the installed engine, chassis identification and body evidence agree with production records and chronological ranges, not whether every component carries one repeated number. A correctly dated service-replacement engine may be historically honest but is not the same as the engine installed when the car was built.

Convertible Coupe Details

A genuine Convertible Coupe requires more than a sedan chassis beneath a fabricated open body. The cowl, doors, windshield structure, rear deck, rumble-seat aperture, top well, body mounts and reinforcement should all be examined for period construction. Door gaps that change when the car is raised can reveal weakness in the sills or body structure.

Original top irons, latches, bows, windshield hardware and rumble-seat hinges are particularly valuable because replacements may require extensive fitting. Surviving examples often acquire generic interior handles, later gauges, sealed-beam headlamp conversions, incorrect taillamps, modern generators and improvised carburetors. Such changes can be reversed, but the price of locating small open-body pieces can exceed the cost of rebuilding a major mechanical assembly.

Paint, Trim and Documentation

Paint should be matched to authenticated period Dodge color literature, factory documents or protected original material found during disassembly. Modern color names assigned by an auction catalog are not substitutes for a period paint specification. The same caution applies to pinstriping, wheel color and the amount of plating on radiator, lamp and windshield components.

Dodge did not use the modern option-code system familiar from postwar cars. Factory and dealer equipment is best established through a build record, sales invoice, period accessory catalog or undisputed physical evidence. Generator, distributor, starter and carburetor numbers can support a restoration, but service replacements accumulated quickly on cars that remained in use through the Depression and wartime material shortages.

Variant and Body-Style Breakdown

The DH designation covered a passenger-car series rather than a single trim level. The open car shared its basic engine and chassis specification with closed DH models, while body construction, seating and weather protection created the practical differences shown below.

No factory homologation, competition or high-output version of the DH Convertible Coupe is recognized as part of the normal series. Claims of a special racing engine, prototype body or one-off factory specification need primary documentation.

Performance and Dimensional Specifications

Dodge promoted usable power and mechanical durability rather than instrumented acceleration. Reliable factory or period road-test figures for 0–60 mph, quarter-mile time and maximum speed are not consistently available for the Convertible Coupe, and modern estimates are not appropriate substitutes.

Published curb weights and overall dimensions can vary by body listing and equipment. Before using a figure for concours documentation, transport planning or registration, owners should identify whether the source describes the Convertible Coupe itself or a heavier DH sedan.

Compared With Related Dodge Models

DH Six Versus DG Eight

The DG Eight represented Dodge's eight-cylinder offering for 1931, whereas the DH retained the 211.5-cubic-inch six. The distinction extends beyond cylinder count: engine dimensions, chassis specification, model identification and associated service parts must be researched by series rather than assumed interchangeable because the bodies share contemporary Dodge styling.

A DG identity should never be assigned from appearance alone. Hood length, trim and restored body details can mislead, while decades of component swapping further complicate visual inspection. Serial and engine evidence remain decisive.

DH Versus the 1930 DD Six

The DD belongs to Dodge's preceding six-cylinder series. Although it shares the general vocabulary of upright bodywork, separate fenders and side-valve power, the series designation affects chassis dimensions, sheet metal, mechanical parts and restoration references. Sellers sometimes group all early-1930s Dodge sixes together, but that shortcut is unsafe when purchasing a radiator, hood, axle component or body hardware.

DH Versus the 1932 DL Six

The DL is Dodge's recognized six-cylinder series for the 1932 model program. This is the most important comparison when a DH carries a 1932 title. Registration year does not convert a DH into a DL, and a correct description should preserve the stamped series evidence even if state paperwork records a later first-sale date.

The DH also predates the more pronounced streamlined styling that spread through the industry during the following model years. Its separate visual elements, tall grille and defined running boards retain the architecture of the late 1920s, while later Dodge bodies became progressively more integrated.

Ownership and Restoration Notes

Mechanical Work

The L-head six is conceptually simple, but a correct rebuild requires a machine shop familiar with prewar engines. Cylinder-wall condition, block and head cracks, valve-seat recession, crankshaft journals, bearing clearances, oil-pump wear and water-jacket sediment all require measurement. Ordering pistons or bearings by displacement alone is risky because early Dodge engine families can differ in details not obvious from an advertisement.

Cooling problems often follow incomplete restoration. Removing the radiator for a proper flow test, cleaning sediment from the block, checking the water pump and confirming ignition timing are more effective than fitting an electric fan to conceal the cause. A restricted water jacket can make an engine run acceptably at low speed but overheat during a sustained climb.

Gearbox noise should be assessed with the clutch engaged and disengaged, under acceleration and on overrun. Worn bearings, chipped gears and an incorrectly adjusted clutch produce different symptoms. Rear-axle whine may reflect bearing wear or disturbed gear setup, and indiscriminate adjustment can worsen an axle that was merely noisy.

Body and Structural Work

The Convertible Coupe's body is usually the expensive part of the project. Rust in the lower cowl, sills, door bottoms, rear wheel housings, rumble-seat gutter and the floor around body mounts can coexist with weakened internal wood or old collision repairs. Fresh paint can temporarily disguise all of them.

Top hardware and weather sealing deserve their own restoration plan. An incorrect bow profile changes the roof silhouette, while poor side-curtain fit makes the car nearly unusable in rain. Rumble-seat drains must remain clear because trapped water attacks the rear structure from inside.

Parts and Documentation

Routine ignition, brake and engine-service components can often be rebuilt or sourced through prewar Dodge specialists. Convertible-only sheet metal, top irons, windshield pieces, rumble-seat hardware and original trim are much less plentiful. Reproduction parts vary in fidelity, and some require machining, plating or hand fitting before they resemble factory pieces.

A useful restoration file should retain photographs taken before disassembly, serial and engine rubbings, fastener locations, upholstery fragments, paint samples and copies of all historical documents. Removing deteriorated material without recording it can destroy the only evidence available for stitching patterns, grain direction, pinstriping or hardware finish.

Buyer and Inspection Points

A purchase inspection should concentrate first on identity and open-body structure, then on the mechanical systems. A complete but worn car is often a sounder proposition than a freshly painted project missing its DH-specific and Convertible Coupe-only hardware.

A road test should begin with the engine fully cold. A seller-warmed engine can hide slow oil-pressure response, hard starting, piston noise or cooling-system leakage. The test should also include rough pavement and a moderate descent so that shock-absorber control and brake balance can be judged safely.

Collector and Market Relevance

Within the DH family, the Convertible Coupe attracts attention because far fewer open bodies survived than four-door sedans. Open cars suffered from deteriorated tops and body timber, while their stylish bodies also encouraged modification, hot-rodding and incomplete restorations. Survival alone, however, does not establish quality.

Collectors generally favor an authentic DH chassis and body, legible identification, a chronologically correct engine, complete top and rumble-seat hardware, restrained period colors and a documented restoration. A preserved car with worn original trim can be more instructive than a heavily restored example assembled from several body styles.

Auction results can differ sharply according to body authenticity and restoration quality. An attractive exterior cannot compensate indefinitely for incorrect serial evidence, fabricated top hardware or a body that changes shape when lifted. Conversely, a well-documented Convertible Coupe can appeal beyond Dodge specialists because it combines recognized prewar engineering with the visual drama of a rumble-seat open car.

Cultural Relevance

The DH Convertible Coupe belongs to the American road culture of the Depression rather than to a celebrated racing program. Its rumble seat, folding top and formal upright nose illustrate how manufacturers continued to sell personal, leisure-oriented bodies even as buyers increasingly chose practical closed cars.

Surviving examples are most often encountered through Dodge Brothers groups, Chrysler-oriented clubs, Antique Automobile Club of America events and regional prewar tours. That club network matters because interchange knowledge, original literature and specialist contacts frequently reside with long-term owners rather than in modern parts catalogs.

The model also documents a short transition in Dodge history. Chrysler ownership was established, an eight-cylinder Dodge was available, and styling was about to move rapidly toward sloped grilles and more integrated bodies. The DH still presented each component separately: radiator, hood, lamps, fenders, running boards and passenger body.

Frequently Asked Questions

What engine is in the Dodge DH Six Convertible Coupe?

It uses a 211.5-cubic-inch, approximately 3.47-liter, L-head inline-six with a 3.25-inch bore and 4.25-inch stroke. Factory-era specifications commonly rate it at 68 horsepower.

Was the Dodge DH Six built in both 1931 and 1932?

The DH is chiefly identified with Dodge's 1931 model program. Some cars are titled or advertised as 1932 models because they were sold or registered later, but the serial and series evidence should be used to distinguish a DH from the 1932 DL Six.

How can I identify a genuine DH Convertible Coupe?

Confirm the DH serial evidence and inspect the body as a complete structure, including the cowl, windshield, doors, sills, top well, rear deck, rumble-seat opening and body mounts. A factory open body should not be accepted solely because a car has a folding top and rumble seat.

Did the DH Convertible Coupe have hydraulic brakes?

Yes. The DH used four-wheel hydraulic drum brakes. Condition matters more than design age, since corroded cylinders, restricted hoses, poor shoe contact and incorrectly machined drums can make a restored system perform badly.

Are engine and body parts available for the Dodge DH Six?

Service parts and rebuildable mechanical components are generally easier to find than Convertible Coupe body hardware. Top irons, windshield pieces, rumble-seat fittings, trim and correct open-body sheet metal can require specialist searches or careful fabrication.

What are the most expensive DH Convertible Coupe restoration problems?

Weak sills, failed structural wood, rust around the rumble-seat compartment, missing top hardware and incomplete windshield or trim assemblies usually create the largest bills. Engine machining can also be costly, but an incomplete open body can consume far more labor than its condition first suggests.

What makes the Dodge DH Convertible Coupe collectible?

It combines the DH's documented 211.5-cubic-inch drivetrain and hydraulic-brake chassis with a scarce open body, folding top and rumble seat. Collectors place the greatest weight on genuine body construction, coherent identification, complete model-specific hardware and documented restoration work.

Collector Takeaway

The DH Convertible Coupe deserves attention because its body tells the economic story of 1931 as clearly as its specifications do. Dodge supplied a durable six, hydraulic brakes and a 114-inch-wheelbase chassis, then clothed that practical hardware in an open body that fewer Depression-era buyers could justify and fewer later owners managed to preserve.

The best example is not necessarily the brightest one. It is the car whose DH identity survives scrutiny, whose doors and sills remain structurally honest, whose rumble seat and top hardware belong together, and whose restoration respects the low-speed character of the 211.5-cubic-inch six. In that form, the Convertible Coupe records a brief moment when Dodge's square-rigged 1920s architecture met Chrysler-era product planning, just before American body design changed beyond recognition.