The DeSoto Fireflite III Four-Door Sportsman, powered by a 5.6-liter V8 engine and TorqueFlite automatic transmission, represented a significant offering from the Chrysler Corporation’s DeSoto division during the 1956 and 1957 model years. Positioned as a premium full-size sedan, it aimed to blend performance with family-oriented comfort and style. This variant occupied a middle ground within the Fireflite lineup, offering a step up from the base models while remaining below the more luxurious DeSoto Adventurer. The Fireflite III was part of the broader redesign of DeSoto vehicles for 1956, emphasizing longer, lower, and wider styling cues characteristic of the era.
Technical Specifications
| Brand | DeSoto |
| Model | Fireflite |
| Generation | Fireflite III Four-Door Sportsman |
| Type (Engine) | 5.6 V8 (295 Hp) TorqueFlite |
| Start of production | 1956 |
| End of production | 1957 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 6 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Power | 295 Hp @ 4600 rpm |
| Power per litre | 52.8 Hp/l |
| Torque | 508 Nm @ 2800 rpm / 374.68 lb.-ft. @ 2800 rpm |
| Engine Model/Code | S26 |
| Engine displacement | 5588 cm3 / 341 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 96.01 mm / 3.78 in. |
| Piston Stroke | 96.52 mm / 3.8 in. |
| Compression ratio | 9.25:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Carburettor |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV |
| Engine oil capacity | 4.7 l / 4.97 US qt | 4.14 UK qt |
| Coolant | 19.9 l / 21.03 US qt | 17.51 UK qt |
| Fuel tank capacity | 87 l / 22.98 US gal | 19.14 UK gal |
| Length | 5537 mm / 217.99 in. |
| Width | 1986 mm / 78.19 in. |
| Height | 1448 mm / 57.01 in. |
| Wheelbase | 3200 mm / 125.98 in. |
| Front track | 1549 mm / 60.98 in. |
| Rear (Back) track | 1516 mm / 59.69 in. |
| Front overhang | 879 mm / 34.61 in. |
| Rear overhang | 1458 mm / 57.4 in. |
| Ride height (ground clearance) | 137 mm / 5.39 in. |
| Minimum turning circle (turning diameter) | 13.1 m / 42.98 ft. |
| Approach angle | 17.7° |
| Departure angle | 13.3° |
| Ramp-over (brakeover) angle | 9.8° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 3 gears, automatic transmission TorqueFlite |
| Front suspension | Independent coil spring |
| Rear suspension | Leaf spring |
| Steering type | Worm-reduction unit |
Powertrain & Engine Architecture
The heart of the Fireflite III Sportsman was the DeSoto S26 5.6-liter (341 cubic inch) V8 engine. This engine featured a cast iron block and aluminum cylinder heads, utilizing an overhead valve (OHV) configuration. It was equipped with a single Carter carburetor, providing fuel delivery. The 9.25:1 compression ratio contributed to the engine’s respectable 295 horsepower output at 4600 rpm and 374.68 lb-ft of torque at 2800 rpm. The TorqueFlite automatic transmission, a three-speed unit, was standard. This transmission was known for its smooth operation and durability, becoming a hallmark of Chrysler products during the 1950s and 60s. The TorqueFlite featured a compact design and utilized a torque converter for fluid coupling, enhancing drivability.
Driving Characteristics
The combination of the 5.6-liter V8 and the TorqueFlite automatic transmission delivered a comfortable and capable driving experience. While not a performance-oriented setup like some of the era’s larger displacement engines, the Fireflite offered ample power for highway cruising and passing maneuvers. The automatic transmission, while smooth, did result in some power loss compared to a manual transmission. The three-speed configuration meant that acceleration was adequate but not particularly brisk. The gear ratios were optimized for cruising, providing relaxed operation at highway speeds. The rear-wheel-drive layout and leaf spring rear suspension contributed to a somewhat firm ride, typical of full-size American cars of the period.
Equipment & Trim Levels
The Four-Door Sportsman trim level included a generous array of standard features for the time. Interior appointments typically included cloth and vinyl upholstery, with options for full vinyl or leather available. The dashboard featured a prominent instrument cluster with gauges for speed, fuel level, temperature, and oil pressure. Power steering and power brakes were often included as standard equipment, enhancing driver comfort. Optional extras included a radio, heater, air conditioning (a relatively rare option), and whitewall tires. The exterior trim included brightwork around the windows and body sides, along with DeSoto-specific badging.
Chassis & Braking
The Fireflite III rode on a conventional body-on-frame chassis. The front suspension utilized independent coil springs, providing a more comfortable ride compared to a solid axle. The rear suspension employed leaf springs, a common design for full-size American cars of the era, prioritizing load-carrying capacity. Braking was accomplished via drum brakes on all four wheels, although some later models may have featured front disc brakes as an option. Steering was handled by a worm-reduction unit, providing relatively heavy but precise steering feel.
Market Reception & Comparison
The 1956 and 1957 DeSoto Fireflite III Four-Door Sportsman was generally well-received by automotive critics. It was praised for its stylish design, comfortable interior, and smooth-shifting TorqueFlite transmission. However, some critics noted that the performance was not as exhilarating as some of its competitors, such as the Ford Fairlane or Chevrolet Bel Air with larger displacement V8 engines. Compared to other Fireflite trims, the Sportsman offered a balance of features and price. The base Fireflite models were more spartan, while the Adventurer trim was more luxurious and expensive. Fuel economy, while not a primary concern for buyers in the 1950s, was typical for a full-size American car of the period – around 14-16 miles per gallon.
Legacy
The DeSoto Fireflite III Four-Door Sportsman, while not a long-lived model, remains a popular choice among classic car enthusiasts. The 5.6-liter V8 engine and TorqueFlite transmission are known for their durability and relative ease of maintenance. Parts availability can be a challenge, but a dedicated network of suppliers caters to the classic Mopar market. Today, well-maintained examples of the Fireflite III Sportsman command respectable prices, reflecting their historical significance and enduring appeal. The car represents a quintessential example of 1950s American automotive design and engineering, embodying the optimism and style of the era.
