Baseline Specifications And Performance Data For An Unmodified Nissan 240sx
The Nissan 240SX, a rear-wheel-drive sports coupe produced from 1989 to 1998, holds a special place in automotive history, particularly within drifting and tuning communities. Before modifications take place, understanding the baseline specifications and performance data of an unmodified 240SX is crucial. This article provides a comprehensive overview for enthusiasts, potential buyers, and anyone curious about the original capabilities of this iconic vehicle.
Nissan 240SX: Generations and Engine Variants
The 240SX spanned two primary generations, each with subtle but significant differences that impacted performance. Understanding these variations is key to interpreting the baseline specifications.
First Generation (S13: 1989-1994)
The S13 chassis marked the beginning of the 240SX legacy. Initially, from 1989-1990, it was equipped with the KA24E engine – a single overhead cam (SOHC) 2.4-liter inline-four. 1991-1994 models featured the KA24DE, a dual overhead cam (DOHC) version of the same engine. Both engines were naturally aspirated.
Second Generation (S14: 1995-1998)
The S14 generation brought a refreshed design and continued with the KA24DE engine. While the engine remained largely unchanged, minor improvements to the chassis and suspension contributed to a slightly refined driving experience.
Engine Specifications and Performance
The heart of the 240SX is its engine. Let's delve into the specifics:
KA24E (1989-1990 S13)
- Displacement: 2.4 liters (2389 cc)
- Configuration: Inline-four, SOHC
- Horsepower: 140 hp @ 5600 rpm
- Torque: 152 lb-ft @ 2800 rpm
- Compression Ratio: 8.6:1
The KA24E, while reliable, was often considered underpowered by modern standards. Its strength lay in its low-end torque, making it suitable for daily driving. Original sources from Nissan state the horsepower at 140, however, some dyno tests often show a lower output due to age and maintenance.
KA24DE (1991-1998 S13 & S14)
- Displacement: 2.4 liters (2389 cc)
- Configuration: Inline-four, DOHC
- Horsepower: 155 hp @ 5600 rpm
- Torque: 160 lb-ft @ 4400 rpm
- Compression Ratio: 9.5:1
The KA24DE represented an improvement over the KA24E. The dual overhead cam design allowed for better airflow and increased horsepower and torque. While still not a powerhouse, it offered a more responsive and enjoyable driving experience. Again, actual dyno results may vary due to age and maintenance factors.
Performance Data (Unmodified)
The following data represents approximate performance figures for an unmodified 240SX in good condition. Real-world results can vary based on factors such as vehicle maintenance, tire condition, and driver skill.
0-60 MPH Acceleration
- KA24E: Approximately 8.5 - 9.0 seconds
- KA24DE: Approximately 7.9 - 8.5 seconds
Quarter Mile Time
- KA24E: Approximately 16.5 - 17.0 seconds
- KA24DE: Approximately 16.0 - 16.5 seconds
Top Speed
- KA24E: Approximately 125 mph (electronically limited)
- KA24DE: Approximately 130 mph (electronically limited)
These figures highlight the difference between the two engine variants, with the KA24DE providing a noticeable improvement in acceleration. It's important to note that these are *baseline* figures; the 240SX's true potential lies in its aftermarket support and tuning capabilities.
Chassis and Suspension
The 240SX's handling characteristics are just as important as its engine performance. Its well-balanced chassis and independent suspension contributed significantly to its popularity.
Suspension
All 240SX models featured a four-wheel independent suspension system. This consisted of:
- Front: MacPherson struts with lower control arms
- Rear: Multi-link suspension
This setup provided a good balance of handling and ride comfort, making it a versatile platform for both street and track use. The rear multi-link suspension is particularly noteworthy as it allowed for precise control and predictable handling, a key factor in its drifting appeal.
Brakes
The 240SX came equipped with disc brakes on all four wheels. ABS (Anti-lock Braking System) was an optional feature on some models.
Weight
- S13: Approximately 2670 - 2750 lbs (depending on trim and options)
- S14: Approximately 2700 - 2800 lbs (depending on trim and options)
The relatively lightweight construction of the 240SX contributed to its agile handling and responsiveness. Even with the relatively modest horsepower figures, the low weight allowed for a fun and engaging driving experience.
Transmission
The 240SX was available with both a 5-speed manual and a 4-speed automatic transmission. The manual transmission is generally preferred by enthusiasts for its greater control and responsiveness.
5-Speed Manual
The 5-speed manual offered precise and direct gear changes, enhancing the driving experience. It was the transmission of choice for those seeking maximum performance.
4-Speed Automatic
The 4-speed automatic provided a more relaxed driving experience. While not as performance-oriented as the manual, it was a suitable option for daily driving.
Common Issues and Maintenance Considerations
When assessing a 240SX, especially a used model, it's crucial to be aware of common issues and maintenance considerations.
- Rust: Rust is a significant concern, especially in areas with harsh winters. Inspect the undercarriage, rocker panels, and wheel wells thoroughly.
- Engine Condition: The KA24E and KA24DE are generally reliable engines, but neglect can lead to issues. Check for oil leaks, unusual noises, and signs of overheating. A compression test is highly recommended.
- Suspension Wear: Suspension components, such as bushings and ball joints, can wear out over time, affecting handling and ride quality.
- Electrical Issues: Electrical gremlins can plague older vehicles. Check all lights, gauges, and accessories for proper functionality.
- Modifications: Be wary of heavily modified vehicles. While some modifications may be beneficial, others can compromise reliability and performance. Always ask for detailed records of any modifications.
Why Understanding Baseline Specifications Matters
Understanding the baseline specifications and performance data of an unmodified 240SX is essential for several reasons:
- Accurate Assessment: It allows you to accurately assess the condition of a used 240SX. If a car is significantly underperforming compared to its baseline figures, it may indicate underlying problems.
- Informed Modifications: Knowing the starting point allows you to make informed decisions about modifications. You can better understand the potential gains and drawbacks of various upgrades.
- Performance Expectations: It helps you set realistic performance expectations. The 240SX, in its unmodified form, is not a particularly fast car by modern standards. However, it offers a balanced and engaging driving experience.
- Appreciation for the Platform: Understanding the original design and engineering allows you to appreciate the platform's strengths and weaknesses. This can lead to a deeper connection with the car and a more rewarding ownership experience.
In conclusion, the Nissan 240SX, in its unmodified state, offers a blend of balanced handling, responsive steering, and a reliable engine. While not a speed demon, its potential for modification and its inherent driving characteristics have cemented its place in automotive history. By understanding the baseline specifications and performance data, enthusiasts can make informed decisions about purchasing, maintaining, and modifying this iconic vehicle.
Remember, the best modifications build upon a solid foundation. Starting with a well-maintained, unmodified 240SX provides the best opportunity to unlock its full potential.