Technical Specifications And Trim Levels Of The 1992 Nissan 240sx Coupe

The 1992 Nissan 240SX coupe, a darling of the drift and modification communities, is more than just a stylish body. It's a carefully engineered machine, and understanding its technical specifications and trim levels provides valuable insight into its appeal and capabilities. This guide delves into the details, offering a comprehensive look at the mechanical underpinnings and feature variations that defined this iconic sports coupe.

Technical Specifications: The Heart of the Machine

The 1992 240SX coupe offered two primary engines, both inline four-cylinder designs, each catering to different performance expectations.

KA24E: The SOHC Workhorse

The base engine was the 2.4-liter KA24E, a single overhead cam (SOHC) design. This engine prioritized reliability and low-end torque over outright horsepower. Key specifications include:

Displacement: 2389 cc (2.4 liters)
Configuration: Inline 4-cylinder
Valvetrain: SOHC, 12 valves (3 valves per cylinder)
Fuel Delivery: Electronic Fuel Injection (EFI)
Compression Ratio: 8.6:1
Horsepower: 140 hp @ 5600 rpm
Torque: 152 lb-ft @ 4400 rpm

The KA24E's SOHC configuration meant simpler construction compared to a dual overhead cam (DOHC) engine. This translated to easier maintenance and generally greater durability. The relatively low compression ratio allowed the engine to run reliably on regular unleaded gasoline. The torque curve was relatively flat, providing good responsiveness for everyday driving. However, its power output was considered modest, especially compared to contemporary engines from other manufacturers. This engine was generally paired with either a 5-speed manual or a 4-speed automatic transmission.

KA24DE: The DOHC Upgrade

For enthusiasts seeking more performance, the 240SX offered the KA24DE engine. This was a significant upgrade from the KA24E, employing a dual overhead cam (DOHC) design. This allowed for improved valve timing and breathing, resulting in higher horsepower and a more rev-happy engine. Key specifications include:

Displacement: 2389 cc (2.4 liters)
Configuration: Inline 4-cylinder
Valvetrain: DOHC, 16 valves (4 valves per cylinder)
Fuel Delivery: Electronic Fuel Injection (EFI)
Compression Ratio: 9.5:1
Horsepower: 155 hp @ 5600 rpm
Torque: 160 lb-ft @ 4400 rpm

The KA24DE's DOHC configuration allowed for finer control over valve timing and lift, leading to improved volumetric efficiency, especially at higher engine speeds. The higher compression ratio, while still relatively moderate, contributed to increased power output. The difference in horsepower between the KA24E and KA24DE may seem small on paper, but the DOHC engine's improved responsiveness and willingness to rev made it a more engaging driving experience. Like the KA24E, the KA24DE was offered with either a 5-speed manual or a 4-speed automatic transmission.

Chassis and Suspension

The 1992 240SX boasted a well-engineered chassis and suspension system that contributed to its reputation as a capable handling car. Key features include:

Layout: Front-engine, rear-wheel drive (FR)
Front Suspension: Independent MacPherson struts with coil springs and stabilizer bar
Rear Suspension: Independent multi-link with coil springs and stabilizer bar
Steering: Power-assisted rack-and-pinion
Brakes: Power-assisted front disc brakes and rear drum brakes (ABS available as an option)

The front MacPherson strut suspension provided a balance of simplicity and effectiveness. The rear multi-link suspension was more sophisticated, allowing for independent control over wheel camber, toe, and caster, resulting in improved handling characteristics. The power-assisted rack-and-pinion steering offered precise and responsive steering feel. While the base models came with rear drum brakes, higher trim levels offered an optional anti-lock braking system (ABS), which enhanced braking performance and safety. The relatively short wheelbase and favorable weight distribution contributed to the car's nimble handling characteristics, making it a popular choice for motorsports, particularly drifting.

Dimensions and Weight

Understanding the dimensions and weight of the 240SX provides further context for its performance and handling:

Wheelbase: 97.4 inches
Length: 176.8 inches
Width: 66.5 inches
Height: 52.6 inches
Curb Weight: Approximately 2700-2800 lbs (depending on trim and options)

The 240SX's compact dimensions and relatively low curb weight contributed significantly to its agility. The relatively short wheelbase made it responsive to steering inputs, while the low weight allowed for quick acceleration and braking. The weight distribution was also favorable, further enhancing its handling prowess.

Trim Levels: Feature Variations

The 1992 Nissan 240SX coupe was available in several trim levels, each offering a different combination of features and equipment. Understanding these trim levels helps to differentiate models and appreciate the options available at the time.

Base Model

The base model was the entry-level 240SX coupe. It typically came equipped with the KA24E engine, manual windows and locks, basic cloth upholstery, and steel wheels. While it lacked some of the features of the higher trim levels, it provided an affordable and accessible platform for enthusiasts. It was a blank canvas, offering opportunities for personalization and modification.

SE (Special Edition)

The SE trim level offered a step up in terms of features and amenities. It typically included the KA24DE engine, alloy wheels, power windows and locks, upgraded cloth upholstery, and a better sound system. It also often included cosmetic enhancements, such as a rear spoiler and sportier trim. The SE model was targeted towards buyers who wanted a more refined and performance-oriented driving experience.

LE (Luxury Edition)

The LE trim level focused on providing a more luxurious and comfortable driving experience. In addition to the features found on the SE model, the LE trim often included leather upholstery, a sunroof, a premium sound system, and automatic climate control. This trim level was designed for buyers who valued comfort and convenience alongside performance.

HICAS (High Capacity Actively Controlled Suspension) - A Noteworthy Option

While not a trim level per se, the High Capacity Actively Controlled Suspension (HICAS) was a notable option available on some 240SX models, particularly the SE and LE trims. HICAS was a four-wheel steering system that improved handling and stability, especially at higher speeds. The system used sensors to monitor vehicle speed, steering angle, and yaw rate, and then electronically controlled the rear wheel steering angle to enhance maneuverability and reduce understeer. While HICAS was a technologically advanced system for its time, it added complexity and weight to the vehicle. Some enthusiasts have removed the HICAS system over time, due to reliability concerns and the availability of aftermarket solutions that achieve similar results with less complexity.

Conclusion

The 1992 Nissan 240SX coupe was a well-engineered and versatile sports coupe that offered a compelling blend of performance, handling, and style. The availability of two different engines and several trim levels allowed buyers to choose a model that suited their individual needs and preferences. Whether it was the reliable and affordable base model or the more powerful and feature-rich SE or LE trims, the 240SX provided a solid foundation for enthusiasts to personalize and modify their cars. Its combination of rear-wheel drive, independent suspension, and a relatively lightweight chassis made it a popular choice for motorsports, while its stylish design and available luxury features made it a desirable daily driver. Understanding the technical specifications and trim levels of the 1992 240SX coupe provides valuable insight into its enduring appeal and its legacy as an automotive icon.