1995-1998 Nissan Skyline IX (R33) 2.5 i 24V GTS (190 Hp)

The Nissan Skyline IX (R33) 2.5 i 24V GTS, produced between 1995 and 1998, represents a significant iteration of Nissan’s iconic Skyline lineage. Positioned as a more accessible and practical alternative to the high-performance GT-R models, the R33 GTS sedan offered a blend of sporty aesthetics, comfortable refinement, and the renowned Nissan inline-six engine. This four-door variant was primarily targeted towards Japanese consumers seeking a dynamic yet comfortable daily driver, and it occupied a mid-range position within the broader R33 Skyline lineup. Built on the 1HX0/A3 platform, the 2.5 i 24V GTS distinguished itself from its coupe siblings and turbocharged counterparts by prioritizing a balanced driving experience over outright performance, appealing to a wider audience within the Japanese domestic market (JDM).

Powertrain & Engine Architecture: The RB25DE

The heart of the Nissan Skyline IX (R33) 2.5 i 24V GTS is the RB25DE engine, a naturally aspirated 2.5-liter (2499 cm³ or 152.5 cu. in.) inline-six cylinder powerplant. This engine is part of Nissan’s highly regarded RB-series, known for its durability and tuning potential. The RB25DE features a Double Overhead Camshaft (DOHC) 24-valve configuration – four valves per cylinder – enhancing volumetric efficiency and contributing to a smooth power delivery. The engine utilizes multi-port fuel injection, carefully metering fuel into each cylinder for optimal combustion.

The engine’s valvetrain is designed for efficient breathing at higher RPMs, while maintaining good low-end torque. The RB25DE in the GTS model produced 190 horsepower at 6400 rpm and 231 Nm (170.38 lb.-ft.) of torque at 4800 rpm. Power is delivered to the rear wheels via a 5-speed automatic transmission. This transmission, while not offering the direct engagement of a manual gearbox, provides smooth and convenient shifting, making it well-suited for everyday driving. The automatic transmission’s gear ratios are tuned for a balance between acceleration and fuel efficiency. The engine’s compression ratio of 10:1 is optimized for use with gasoline fuel.

Transmission Details

The 4-speed automatic transmission used in the R33 2.5 i 24V GTS (designated as the A50-42) was a robust unit designed to handle the RB25DE’s torque output. While not known for being particularly sporty, it offered reliable performance and contributed to the car’s overall ease of driving. The transmission features torque converter lock-up for improved fuel economy at cruising speeds. Compared to the 5-speed manual transmission available on other R33 models, the automatic offered a more relaxed driving experience, sacrificing some performance for convenience.

Driving Characteristics

The Nissan Skyline IX (R33) 2.5 i 24V GTS with the automatic transmission delivers a refined and comfortable driving experience. While it doesn’t possess the exhilarating acceleration of the turbocharged GT-R variants, the naturally aspirated RB25DE provides a linear and predictable power band. The automatic transmission contributes to smooth acceleration, although it may not offer the same level of driver control as a manual gearbox. The car’s weight of approximately 1360 kg (2998.29 lbs) results in a weight-to-power ratio of 7.2 kg/Hp, providing adequate performance for everyday driving and spirited excursions. The rear-wheel-drive configuration provides a balanced chassis and predictable handling characteristics, making it enjoyable to drive on winding roads.

Compared to the manual transmission equipped GTS models, the automatic version offers slightly reduced acceleration due to transmission losses. However, the convenience and ease of use of the automatic transmission make it a popular choice for drivers who prioritize comfort and practicality. The automatic transmission also allows the driver to focus more on steering and braking, enhancing the overall driving experience.

Equipment & Trim Levels

The Nissan Skyline IX (R33) 2.5 i 24V GTS typically came equipped with a range of standard features designed to provide comfort and convenience. These included power windows, power door locks, and a factory-installed audio system. Interior upholstery was typically cloth, although leather options were available as upgrades. The dashboard layout was functional and driver-focused, with clear instrumentation and ergonomically placed controls. Air conditioning was standard equipment, essential for the Japanese climate. Optional extras included a sunroof, upgraded audio systems, and alloy wheels. The GTS trim level generally offered a more refined interior compared to the base models, with higher-quality materials and additional sound insulation.

Chassis & Braking

The R33 Skyline GTS sedan utilized a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable ride and predictable handling. The suspension was tuned to balance ride comfort with handling performance, making it suitable for both city driving and highway cruising. The braking system consisted of ventilated disc brakes at the front and solid disc brakes at the rear. Anti-lock Braking System (ABS) was standard, enhancing braking performance and safety. The car rode on 205/60 R15 tires, providing a good balance of grip and ride quality. A stabilizer bar was fitted to both the front and rear suspension, reducing body roll during cornering.

Market Reception & Comparison

The Nissan Skyline IX (R33) 2.5 i 24V GTS was generally well-received by Japanese automotive critics as a capable and refined mid-size sedan. It was praised for its smooth engine, comfortable ride, and balanced handling. Compared to the turbocharged GT-R variants, the GTS was seen as a more practical and affordable option, appealing to a wider range of buyers. Fuel economy was considered respectable for a 2.5-liter inline-six engine, averaging around 29.4 US mpg (8 liters per 100 km). Reliability was generally good, with the RB25DE engine proving to be a durable and long-lasting powerplant. Compared to competitors like the Toyota Chaser and Mazda Eunos Cosmo, the Skyline GTS offered a unique blend of performance, refinement, and styling.

Technical Specifications

Legacy

The Nissan Skyline IX (R33) 2.5 i 24V GTS, while not as highly sought after as the GT-R variants, has developed a loyal following among enthusiasts. The RB25DE engine is known for its durability and potential for modification, making it a popular choice for engine swaps and performance upgrades. In the used car market, R33 GTS sedans are becoming increasingly collectible, particularly those in good condition with low mileage. The car’s relatively simple mechanical design and readily available parts make it a relatively easy vehicle to maintain and repair. The R33 GTS sedan represents a compelling entry point into the world of Skyline ownership, offering a blend of performance, refinement, and classic JDM styling.