The DeSoto Firesweep I 2-Door Sportsman, powered by a 5.3-liter V8 engine and equipped with a PowerFlite automatic transmission, represented a significant offering in the mid-1950s American automotive landscape. Produced for the 1956 and 1957 model years, this variant occupied a position within the broader Firesweep range, aiming to blend style, performance, and convenience for the American family. It was part of the first generation of the Firesweep, a model intended to revitalize the DeSoto brand with a more modern and sporty image. The Firesweep competed with other mid-range American automobiles like the Oldsmobile 88 and the Buick Century.
Technical Specifications
| Brand | DeSoto |
| Model | Firesweep |
| Generation | Firesweep I 2-Door Sportsman |
| Type (Engine) | 5.3 V8 (245 Hp) PowerFlite |
| Start of production | 1956 |
| End of production | 1957 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 6 |
| Doors | 2 |
| Fuel Type | Petrol (Gasoline) |
| Power | 245 Hp @ 4400 rpm |
| Power per litre | 46 Hp/l |
| Torque | 434 Nm @ 2400 rpm / 320.1 lb.-ft. @ 2400 rpm |
| Engine Model/Code | S27 |
| Engine displacement | 5326 cm3 / 325.01 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 93.73 mm / 3.69 in. |
| Piston Stroke | 96.52 mm / 3.8 in. |
| Compression ratio | 8.5:1 |
| 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 | 76 l / 20.08 US gal | 16.72 UK gal |
| Length | 5481 mm / 215.79 in. |
| Width | 1986 mm / 78.19 in. |
| Height | 1440 mm / 56.69 in. |
| Wheelbase | 3099 mm / 122.01 in. |
| Front track | 1547 mm / 60.91 in. |
| Rear (Back) track | 1516 mm / 59.69 in. |
| Front overhang | 925 mm / 36.42 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 | 18.9° |
| Departure angle | 12.9° |
| Ramp-over (brakeover) angle | 10.2° |
| 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 | 2 gears, automatic transmission PowerFlite |
| Front suspension | Independent coil spring |
| Rear suspension | Leaf spring |
| Steering type | Worm-reduction unit |
Powertrain & Engine Architecture
The heart of the Firesweep I 2-Door Sportsman was the DeSoto S27 5.3-liter (325 cubic inch) V8 engine. This engine featured a cast iron block and cylinder heads, with a 8.5:1 compression ratio. It utilized a single Carter carburetor for fuel delivery, a common setup for the era. The engine employed an overhead valve (OHV) valvetrain with two valves per cylinder. The PowerFlite automatic transmission, a two-speed unit, was specifically designed by Chrysler Corporation to handle the V8’s torque. The PowerFlite was known for its smooth operation, but lacked the versatility of more modern automatic transmissions. It was a relatively simple design, prioritizing durability and ease of maintenance over outright performance.
Driving Characteristics
The 245 horsepower and 320 lb-ft of torque provided by the 5.3L V8 and PowerFlite combination delivered adequate, though not exhilarating, performance for the time. The two-speed automatic transmission meant that acceleration was brisk from a standstill, but passing maneuvers required careful planning. Compared to the manual transmission options available on other DeSoto models, or the higher-output engines offered in the Firesweep range, this configuration prioritized comfort and ease of driving over sporty handling. The PowerFlite’s gear ratios were optimized for cruising, making it well-suited for highway driving, but less responsive in city traffic. The rear-wheel-drive layout provided predictable handling, but lacked the sophistication of more modern suspension systems.
Equipment & Trim Levels
The Firesweep I 2-Door Sportsman with the 5.3L V8 and PowerFlite transmission typically came standard with features considered luxurious for the mid-1950s. These included full wheel covers, a two-tone paint scheme, and a spacious interior upholstered in cloth and vinyl. Power steering and power brakes were often optional extras. The dashboard featured a combination of analog gauges and warning lights, providing essential information to the driver. Optional extras included a radio, heater, and air conditioning, adding to the vehicle’s comfort and convenience. The interior trim was generally focused on providing a comfortable and stylish environment for passengers.
Chassis & Braking
The Firesweep I 2-Door Sportsman utilized a body-on-frame construction, typical of American automobiles of the era. The front suspension consisted of independent coil springs, providing a relatively comfortable ride. The rear suspension employed leaf springs, which were robust and capable of handling the vehicle’s weight. 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, which provided adequate control but lacked the precision of more modern steering systems. The chassis was designed to provide a balance between ride comfort and handling stability.
Market Reception & Comparison
The DeSoto Firesweep I 2-Door Sportsman 5.3 V8 with the PowerFlite transmission was generally well-received by automotive critics. It was praised for its stylish design, comfortable ride, and smooth-shifting automatic transmission. However, some critics noted that the two-speed PowerFlite transmission was somewhat outdated compared to the more advanced automatic transmissions offered by competitors. Fuel economy was typical for the era, averaging around 15-18 miles per gallon. Compared to other Firesweep trims, such as those equipped with the larger 5.8-liter V8, this variant offered a more affordable entry point into the Firesweep lineup, appealing to buyers who prioritized comfort and convenience over outright performance.
Legacy
The DeSoto Firesweep I 2-Door Sportsman 5.3 V8 with PowerFlite, while not a high-performance machine by today’s standards, represents a significant piece of American automotive history. The S27 V8 engine proved to be relatively durable, and many examples are still running today. However, finding parts for these older vehicles can be challenging. The PowerFlite transmission, while reliable, is prone to wear and tear with age. In the used car market, well-maintained examples of the Firesweep I 2-Door Sportsman are sought after by collectors and enthusiasts who appreciate their classic styling and vintage charm. The car remains a symbol of the optimistic post-war era in American automotive design.
