1991 Nissan 240sx Technical Specifications And Performance Data
The 1991 Nissan 240SX remains a beloved icon in the automotive world, especially among drifting enthusiasts and tuners. Known for its balanced chassis, responsive handling, and potential for modification, it's crucial to understand the technical specifications and performance data that made this car so special. This article delves into the details, providing a comprehensive overview for anyone interested in learning more about the 1991 Nissan 240SX.
1991 Nissan 240SX: Engine Specifications
The heart of the 1991 Nissan 240SX lies in its engine. Understanding the engine's specifics is paramount to appreciating its performance capabilities.
KA24DE Engine
The 1991 240SX was equipped with the KA24DE engine, a 2.4-liter, inline-four cylinder engine. This engine was a significant upgrade from the earlier KA24E, offering improved performance and refinement.
Displacement: 2389 cc (2.4 liters)
Configuration: Inline-4
Valvetrain: DOHC, 4 valves per cylinder (16 valves total)
Fuel Delivery: Electronic Fuel Injection (EFI)
Compression Ratio: 9.5:1
Bore x Stroke: 89 mm x 96 mm
The KA24DE's displacement and DOHC design contributed to a broader torque curve compared to its single-cam predecessor. This made the 1991 240SX more responsive in everyday driving situations.
Performance Data
Understanding the engine is only half the story. The performance data reveals how the engine translated into real-world driving experience.
Horsepower and Torque
The 1991 Nissan 240SX's KA24DE engine produced the following:
Horsepower: 155 hp (116 kW) @ 5600 rpm
Torque: 160 lb-ft (217 Nm) @ 4400 rpm
These figures are respectable for a sports coupe of its era. The torque output, in particular, made the 240SX enjoyable to drive, providing ample power for acceleration and spirited driving.
Acceleration and Top Speed
The 1991 Nissan 240SX offered decent acceleration for its class:
0-60 mph: Approximately 8.5 seconds (manual transmission)
Top Speed: Approximately 135 mph (217 km/h)
While not blistering by today's standards, these figures were competitive for the time and provided a fun and engaging driving experience, especially when combined with the car's balanced handling.
Drivetrain and Transmission
The drivetrain and transmission are crucial components in delivering the engine's power to the wheels.
Drivetrain
The 1991 Nissan 240SX is a rear-wheel-drive (RWD) vehicle. This configuration is a significant factor in its popularity among enthusiasts, as it provides a classic sports car driving experience and allows for oversteer and drifting capabilities.
Transmission Options
The 1991 240SX was available with two transmission options:
5-speed manual transmission: This was the preferred choice for enthusiasts, offering direct control and enhanced driving engagement.
4-speed automatic transmission: This provided a more relaxed driving experience and was geared towards comfort.
The 5-speed manual is generally considered more desirable due to its responsiveness and ability to extract the most performance from the engine. The 4-speed automatic, while convenient, dampened the car's sporty character.
Chassis and Suspension
The chassis and suspension design contributed significantly to the 1991 Nissan 240SX's renowned handling characteristics.
Suspension
The 1991 240SX featured a sophisticated suspension system for its time:
Front Suspension: Independent MacPherson struts with coil springs and anti-roll bar
Rear Suspension: Independent multi-link with coil springs and anti-roll bar
This independent suspension setup provided excellent road holding and precise handling. The multi-link rear suspension, in particular, helped to maintain consistent tire contact with the road, improving grip and stability. This is a key reason why the 240SX is so well-regarded for its handling prowess.
Brakes
The braking system of the 1991 Nissan 240SX consisted of:
Front Brakes: Ventilated disc brakes
Rear Brakes: Disc brakes
This setup provided adequate stopping power for everyday driving and spirited performance. Some models were available with an optional Anti-lock Braking System (ABS), further enhancing safety.
Dimensions and Weight
The dimensions and weight of the 1991 Nissan 240SX influenced its handling and overall performance.
Dimensions
Wheelbase: 97.4 inches (2474 mm)
Length: 176.8 inches (4491 mm)
Width: 66.5 inches (1689 mm)
Height: 50.6 inches (1285 mm)
Weight
Curb Weight: Approximately 2700-2800 lbs (1225-1270 kg), depending on options and transmission.
The relatively lightweight and compact dimensions of the 1991 240SX contributed to its agile handling and nimble feel. The near 50/50 weight distribution (close to 55/45) further enhanced its balance and responsiveness.
Fuel Economy
Fuel economy is always a consideration, even for sports cars.
The 1991 Nissan 240SX's fuel economy figures were:
EPA Estimated MPG: Approximately 22 mpg city / 29 mpg highway (manual transmission). Automatic versions might see slightly lower figures.
These figures are estimates and can vary depending on driving style, vehicle condition, and maintenance.
Variations and Trim Levels
The 1991 Nissan 240SX was available in different trim levels, each offering a slightly different set of features and equipment.
Base Model
The base model offered the core 240SX experience with essential features and equipment.
SE Model
The SE model typically included additional features such as upgraded interior trim, alloy wheels, and sometimes optional features like ABS.
It's important to note that specific features and options could vary depending on the region and production year.
Common Modifications
The 1991 Nissan 240SX is a popular platform for modifications. Common upgrades include:
Engine Swaps: The SR20DET (from the Nissan Silvia) is a popular engine swap, offering significantly more power.
Suspension Upgrades: Coilovers, sway bars, and adjustable arms are common upgrades to improve handling.
Brake Upgrades: Larger rotors, calipers, and performance brake pads can improve stopping power.
Forced Induction: Adding a turbocharger or supercharger to the KA24DE engine can significantly increase power output.
When modifying a 1991 240SX, it's important to consider the overall balance and reliability of the vehicle. Proper research and planning are essential to ensure that the modifications are done correctly and safely.
Conclusion
The 1991 Nissan 240SX is a significant car in automotive history. Understanding its technical specifications and performance data provides valuable insight into why it remains a popular choice for enthusiasts and tuners. Its balanced chassis, responsive engine, and rear-wheel-drive configuration create a fun and engaging driving experience that is hard to replicate. Whether you are considering purchasing one or simply want to learn more about this iconic vehicle, the information presented here should provide a comprehensive overview of the 1991 Nissan 240SX.