The DeSoto Firesweep I 2-Door Sportsman, powered by a 5.3-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 stylish and relatively affordable full-size car, the Firesweep aimed to capture a segment of the American market seeking a blend of performance and comfort. This particular configuration, with its 245 horsepower V8 and automatic gearbox, was a popular choice for buyers prioritizing ease of driving over outright performance, though it still delivered respectable power for the era. The Firesweep was part of the first generation of the model, built on the Chrysler A-body platform.
Technical Specifications
| Brand | DeSoto |
| Model | Firesweep |
| Generation | Firesweep I 2-Door Sportsman |
| Type (Engine) | 5.3 V8 (245 Hp) TorqueFlite |
| 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 | 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 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 and an overhead valve (OHV) valvetrain. The engine produced 245 horsepower at 4400 rpm and 434 Nm (320.1 lb-ft) of torque at 2400 rpm. The TorqueFlite automatic transmission, a three-speed unit, was standard equipment. This transmission was known for its smoothness and durability, contributing to the Firesweep’s comfortable driving experience. The TorqueFlite was a relatively new design for Chrysler, offering a significant improvement over previous automatic transmissions.
Driving Characteristics
The 1956-1957 Firesweep with the 5.3L V8 and TorqueFlite offered a comfortable and relaxed driving experience. While not a performance-oriented machine, the 245 horsepower engine provided adequate power for highway cruising and passing maneuvers. The automatic transmission smoothed out power delivery, making it easy to drive in city traffic. Compared to the more powerful DeSoto Adventurer, which featured a higher-output V8, the Firesweep prioritized comfort and fuel economy. The three-speed TorqueFlite transmission had relatively conservative gear ratios, favoring smooth acceleration over quick bursts of speed. The rear-wheel-drive configuration provided predictable handling, typical of American cars of the era.
Equipment & Trim Levels
The Firesweep I 2-Door Sportsman was generally well-equipped for its price point. Standard features included a spacious interior with comfortable bench seats, a full-width dashboard with a prominent instrument cluster, and ample chrome trim both inside and out. Upholstery was typically cloth and vinyl, with options for upgraded materials. Power steering and power brakes were available as optional extras, enhancing the driving experience. The “Sportsman” designation indicated a slightly more upscale trim level compared to the base Firesweep, often including additional exterior brightwork and interior refinements. Available options included a radio, heater, and whitewall tires.
Chassis & Braking
The Firesweep I rode on a conventional chassis with independent coil spring suspension in the front and leaf springs in the rear. This suspension setup provided a comfortable ride, although it wasn’t particularly sporty. Brakes were drum brakes on all four wheels, which were adequate for the car’s weight and performance. Steering was accomplished via a worm-reduction unit, which provided relatively heavy but precise steering feel. The car’s relatively long wheelbase (3099 mm / 122.01 in.) contributed to its stable ride quality.
Market Reception & Comparison
The DeSoto Firesweep I 2-Door Sportsman was generally well-received by automotive critics of the time. It was praised for its stylish design, comfortable ride, and reliable powertrain. However, some critics noted that it lacked the performance of competing models from other manufacturers. Compared to other DeSoto models, such as the Adventurer, the Firesweep offered a more affordable entry point into the DeSoto lineup. Fuel economy was typical for a full-size American car of the era, averaging around 15-18 miles per gallon. Reliability was generally good, although maintenance costs could be relatively high due to the car’s complex mechanical systems.
Legacy
The DeSoto Firesweep I 2-Door Sportsman, while not a groundbreaking vehicle, holds a significant place in automotive history as a representative of 1950s American car design and engineering. Today, these cars are sought after by collectors and enthusiasts. The 5.3L V8 engine and TorqueFlite transmission are known for their durability, and well-maintained examples can still provide years of reliable service. Parts availability can be a challenge, but a dedicated network of DeSoto enthusiasts and parts suppliers exists to support these classic vehicles. The Firesweep represents a bygone era of American automotive styling and engineering, and remains a popular choice for those seeking a classic car with a unique blend of style, comfort, and reliability.
