1958-1959 DeSoto Firesweep I Station Wagon (facelift ) Explorer 5.9 V8 (295 Hp) PowerFlite

The DeSoto Firesweep I Station Wagon, specifically the 1959 facelifted model equipped with the Explorer 5.9 V8 engine and PowerFlite automatic transmission, represented a significant offering in the American station wagon market. Produced for the 1958 and 1959 model years, the Firesweep was DeSoto’s full-size offering, positioned as a step up from the more economical DeSoto Diplomat. The station wagon body style, a popular choice for families, was a key component of the Firesweep lineup, offering both space and style. This particular configuration, with the 295 horsepower V8 and automatic transmission, aimed to provide a balance of power and convenience for buyers seeking a comfortable and capable family vehicle.

Technical Specifications

Powertrain & Engine Architecture

The heart of this Firesweep variant was the DeSoto Explorer 5.9 V8 engine. Displacing 5916 cubic centimeters (361.02 cubic inches), this engine was a robust, overhead valve (OHV) design. It featured a cast iron block and cylinder heads, a common construction for American V8s of the era. The engine utilized a carburetor for fuel delivery, a standard feature for the time, and boasted a 10:1 compression ratio. The 295 horsepower output at 4600 rpm and 529 Nm (390.17 lb.-ft.) of torque at 2400 rpm provided ample power for moving the sizable station wagon. The PowerFlite automatic transmission, a two-speed unit, was the sole transmission option for this configuration. While not as sophisticated as some later automatics, the PowerFlite was known for its durability and smooth operation. It was a torque converter type transmission, providing a fluid coupling between the engine and the drivetrain.

Driving Characteristics

The combination of the 5.9L V8 and the PowerFlite automatic transmission resulted in a driving experience focused on comfortable cruising rather than outright performance. The two-speed automatic, while simple, did offer relatively quick acceleration from a standstill, utilizing the engine’s substantial low-end torque. However, the limited number of gears meant that the engine could feel somewhat strained at higher speeds, particularly when climbing hills. Compared to the manual transmission options available on other DeSoto models, or the higher-output versions of the V8, this configuration prioritized ease of use over sporty handling. The PowerFlite’s shift points were calibrated for smooth transitions, making it ideal for relaxed family motoring. The large size and weight of the Firesweep station wagon also contributed to a more deliberate driving feel.

Equipment & Trim Levels

The 1959 Firesweep station wagon, when equipped with the Explorer 5.9 V8 and PowerFlite transmission, typically represented a mid-range trim level within the Firesweep lineup. Standard features included a spacious interior with seating for up to nine passengers, a generously sized cargo area, and a relatively well-appointed dashboard. Interior upholstery was typically cloth and vinyl, with options for different color schemes. Power steering and power brakes were often included as standard equipment, reflecting the Firesweep’s positioning as a premium vehicle. Optional extras could include a radio, heater, air conditioning, and various trim enhancements. The station wagon body style itself was considered a desirable feature, offering practicality and versatility for families.

Chassis & Braking

The Firesweep I Station Wagon utilized a body-on-frame construction, typical of American cars of the late 1950s. The chassis featured an independent torsion bar suspension at the front, providing a relatively comfortable ride. The rear suspension employed leaf springs, a more traditional design that prioritized load-carrying capacity. Braking duties were handled by drum brakes on all four wheels, measuring 279 mm in diameter. While adequate for the time, the drum brakes lacked the stopping power and fade resistance of later disc brake systems. Steering was accomplished via a worm-reduction unit, which provided a relatively indirect steering feel.

Market Reception & Comparison

The 1959 DeSoto Firesweep, including the 5.9 V8 automatic variant, received generally positive reviews from automotive critics. The spacious interior, comfortable ride, and powerful engine were frequently praised. However, some critics noted the car’s large size and relatively dated styling compared to some of its competitors. Compared to other station wagons of the era, such as those offered by Chevrolet, Ford, and Plymouth, the Firesweep offered a more luxurious and refined experience, but at a higher price point. Fuel economy was typical for a large American car of the time, averaging around 15-18 miles per gallon. Reliability was generally good, although the carburetor could require occasional adjustments.

Legacy

The DeSoto Firesweep I Station Wagon, particularly the 1959 model, holds a nostalgic appeal for collectors and enthusiasts of classic American automobiles. The Explorer 5.9 V8 engine and PowerFlite transmission, while not the most technologically advanced components, proved to be relatively durable and reliable. Today, well-maintained examples of this vehicle are sought after by those seeking a piece of automotive history. Parts availability can be a challenge, but a dedicated network of suppliers caters to the classic DeSoto market. The Firesweep represents a bygone era of American automotive design, characterized by bold styling, powerful engines, and a focus on comfort and convenience. The 1959 facelifted model is often considered the most desirable of the Firesweep I generation, due to its refined styling and improved features.