The Acura RSX, since its 2002 debut, has firmly established itself as a significant player in the sports coupe arena, particularly resonating with the vibrant “tuner” community. Serving as Acura’s entry point into performance luxury, the RSX, offered in both the sporty RSX and the high-performance RSX Type-S variants, has consistently attracted a younger generation to the brand’s ethos of precision-crafted performance.
Garnering accolades such as Car and Driver’s “10 Best” and Ward’s 10 Best Engines awards, the RSX and RSX Type-S have consistently raised the bar in the sports coupe segment. Their potent engines, luxurious features, advanced safety technologies, and innovative designs have defined a compelling blend of driving exhilaration and sophisticated refinement.
For the 2005 model year, Acura significantly enhanced both the RSX and RSX Type-S, pushing the boundaries of performance and sophistication even further. These improvements were strategically designed with three core objectives:
- Elevate the already impressive performance of the Type-S model by boosting horsepower and optimizing the 6-speed manual transmission for a more engaging driving experience.
- Refine handling precision and enhance ride comfort across both models through meticulous optimization of the suspension, steering, and braking systems.
- Accentuate the RSX’s inherently aggressive yet refined character with enriched styling both inside and out, making a bolder statement on the road.
The standard RSX is propelled by a responsive 16-valve, DOHC i-VTEC 2.0-liter four-cylinder engine, delivering 160 horsepower at 6500 rpm and 141 lb-ft of torque at 4000 rpm. It offers a choice between a 5-speed manual transmission and a 5-speed Sequential SportShift automatic transmission for versatile driving dynamics.
However, the 2005 Acura Rsx Type S truly distinguishes itself with substantial upgrades to its powertrain and chassis. Modifications to the intake, exhaust, and emissions systems of its 16-valve, DOHC i-VTEC 2.0-liter four-cylinder engine result in a significant power increase to 210 horsepower at a thrilling 7800 rpm (up from 200 hp at 7400 rpm in the previous iteration) and 143 lb-ft of torque at 7000 rpm (improved from 142 lb-ft at 6000 rpm). The Type-S is exclusively paired with a close-ratio 6-speed manual transmission, further emphasizing its performance-oriented nature. To complement the engine’s enhanced output, the final gear ratio of this 6-speed manual was shortened by 8.6 percent, yielding noticeably quicker acceleration. Furthermore, the transmission benefits from single cone carbon synchronizers on fifth and sixth gears, replacing the previous double cone brass synchronizers, resulting in a more direct shift feel and reduced internal friction.
Understanding the discerning tastes of modern drivers, both RSX models are equipped with a sport-tuned suspension system, which underwent significant retuning for 2005. This comprehensive revision aimed to amplify the RSX’s fun-to-drive character. The optimized suspension, steering, and braking systems, coupled with increased front and rear body rigidity, collectively contribute to more responsive handling while simultaneously improving overall ride comfort.
A key visual and performance upgrade for the 2005 Type-S model is the introduction of standard 17-inch alloy wheels, an increase from the previous 16-inch wheels. These are fitted with Michelin 215/45R17 all-season high-performance tires, providing enhanced grip and a more assertive stance within the wheel arches.
Complementing the refined suspension, the 2005 RSX benefits from increased body rigidity, achieved through reinforcements in critical areas, particularly around suspension mounting points. Additional insulation within the roof and doors effectively reduces road noise intrusion, while a dynamic damper integrated into the front subframe minimizes engine rocking and vibrations transmitted to the cabin.
Staying true to its enthusiast-focused design, the RSX features a dynamic, “driver-tuned” cockpit. For 2005, this interior space was refreshed with the addition of chrome and titanium-look accents, upgraded materials throughout, and redesigned front seats engineered to provide superior support and comfort during spirited driving.
Exterior styling enhancements for the 2005 model year include newly designed front and rear fascias and side sills on both models. The RSX Type-S further distinguishes itself with a new deck lid spoiler. These changes not only lend the car a sportier, more aggressive aesthetic but also contribute to improved aerodynamic performance.
2005 RSX Model Year Enhancements: A Detailed Summary
RSX and RSX Type-S Shared Upgrades:
- Suspension System Refinements:
- Enhanced handling precision and smoother ride quality.
- Ride height lowered by 7 mm for a more grounded stance.
- Optimized damper and spring settings for improved control and comfort.
- Stiffer stabilizer bars (front and rear for Type-S, front for RSX) for reduced body roll.
- Optimized bushings at suspension installation points for enhanced responsiveness.
- Inversely wound front coil springs to minimize steering impact from suspension compression.
- Steering System Enhancements:
- Refined steering feel and quicker response.
- Faster steering ratio for sharper turn-in.
- Stiffer steering column for improved feedback.
- Increased pump flow by seven percent for enhanced power steering assist.
- Kickback reduction valve to minimize unwanted steering wheel movement.
- Braking System Optimization:
- Enhanced stopping power and pedal feel.
- Reduced pedal stroke for quicker brake engagement.
- Increased master cylinder diameter for greater braking force.
- Increased brake pedal rigidity for a more solid feel.
- Larger Wheels and Tires:
- Larger diameter 17-inch alloy wheels for a more substantial appearance and improved handling.
- 215/45R17 all-season high-performance tires for enhanced traction and grip.
- Increased Body Rigidity:
- Body rigidity increased by 15 percent in the front and 21 percent in the rear through strategically placed reinforcements.
- Noise, Vibration, and Harshness (NVH) Reduction:
- Engine damper added to the front subframe to minimize engine rocking and vibrations transmitted to the cabin.
- Additional insulation material in doors and roof to reduce road noise.
- Sealed side-mirror gaps and added weather stripping to minimize wind noise.
- Aggressive Exterior Restyling:
- New front and rear bumper designs for a more modern and sporty look.
- Redesigned headlight and taillight assemblies for enhanced aesthetics.
- Restyled signature 5-sided Acura grille for a bolder brand identity.
- Redesigned side sill garnish for a more cohesive exterior design.
- Four new exterior color options: Magnesium Metallic, Vivid Blue Pearl, Jade Green Metallic, Blaze Orange Metallic.
- Refreshed Interior Design:
- Deeply bolstered front seats with thicker cushions for improved comfort and support.
- New chrome and titanium-look accents for a more upscale interior ambiance.
- Meter faces changed from metallic to white for enhanced visibility.
RSX Type-S Specific Enhancements:
- Engine Performance Boost:
- Engine intake and exhaust modifications to increase horsepower to 210 hp at 7800 rpm (from 200 hp at 7400 rpm).
- High-performance camshafts to optimize engine breathing and high-end power.
- Enlarged air intake duct for increased airflow.
- Larger diameter exhaust pipes to reduce backpressure and improve exhaust flow.
- Optimized catalytic converter to further minimize exhaust backpressure.
- Optimized 6-Speed Manual Transmission:
- Lower final gear ratio for quicker acceleration and enhanced responsiveness.
- Carbon synchronizers replacing brass on 5th and 6th gears for smoother and more precise shifts.
- Enhanced Chassis Components:
- Larger diameter front strut tower bar for increased front-end rigidity and improved handling.
- Bushings replaced by bearings on strut mounts for quicker steering response and reduced friction.
- Type-S Exclusive Styling:
- Deck lid spoiler for a sportier appearance and improved aerodynamics.
High-Performance Powertrain: The Heart of the RSX Type S
The 2005 RSX lineup is powered by two variations of an innovative 16-valve, DOHC, 2.0-liter four-cylinder engine featuring Acura’s intelligent i-VTEC valve-control system. This system integrates VTC (Variable Timing Control) to continuously adjust intake-camshaft phase in conjunction with Acura’s renowned Variable Valve Timing and Lift Electronic Control (VTEC) system. This sophisticated technology optimizes performance, fuel efficiency, and emissions across a broad power band. The standard RSX utilizes VTC and VTEC on the intake valves and camshaft, while the Type-S i-VTEC system elevates performance further by combining VTC intake phasing with VTEC control over both intake and exhaust valves.
The standard RSX engine delivers a capable 160 horsepower at 6500 rpm and 141 lb-ft of torque at 4000 rpm. However, the 2005 Type-S engine, thanks to performance-focused enhancements including high-performance camshafts, a larger diameter intake duct, and modifications to the exhaust system with larger diameter pipes, produces a robust 210 horsepower at 7800 rpm (up from 200 hp) and 143 lb-ft of torque at 7000 rpm (up from 142 lb-ft). This significant power bump translates to a more exhilarating and engaging driving experience, especially in the higher rev ranges.
Both the RSX and RSX Type-S are designed to meet stringent Low Emission Vehicle-II (LEV-II) standards as set by the California Air Resources Board (CARB) for 2005, demonstrating a commitment to both performance and environmental responsibility.
The 160-horsepower RSX engine channels power to the front wheels through a choice of transmissions: a refined 5-speed manual transmission, celebrated for its smooth shifts and driver engagement, or an optional 5-speed automatic transmission equipped with Acura’s Sequential SportShift system. The SportShift system, initially introduced on the iconic Acura NSX sports car, offers drivers the versatility of automatic operation or manual gear selection, mimicking the control of a traditional manual transmission.
In line with its high-performance mission, the RSX Type-S is exclusively offered with a close-ratio 6-speed manual transmission. Engineered to be exceptionally compact and lightweight, this 6-speed transmission is also designed for quick and precise shifts with short throws. It features a short-throw clutch incorporating an innovative torsion mechanism that significantly reduces noise. For the 2005 model year, the final gear ratio of this transmission was shortened by 8.6 percent to effectively leverage the increased engine power and deliver enhanced acceleration. Multiple synchronizers are utilized to ensure exceptional shift feel. Furthermore, for 2005, single cone carbon synchronizers replaced double cone brass synchronizers on fifth and sixth gears, resulting in faster response and an even more refined shifting experience.
Global Compact Platform: Foundation for Agile Dynamics
The RSX leverages the Global Compact Platform, which enables both a sleek exterior profile and a surprisingly spacious cabin. It incorporates a 4-wheel independent suspension system that, for 2005, underwent substantial retuning to provide even more agile handling and a refined ride comfort. The front suspension utilizes a compact Control-Link MacPherson Strut design, contributing to outstanding handling, ride quality, and efficient packaging. This Control-Link MacPherson Strut design is particularly effective in maximizing each front tire’s contact with the road across the suspension’s range of motion, resulting in quick and responsive handling. At the rear, the RSX is equipped with a compact double-wishbone suspension, which further enhances ride smoothness, delivers excellent handling characteristics, and optimizes cargo space.
To further amplify the RSX’s fun-to-drive nature, both 2005 models received significant suspension revisions specifically engineered to enhance handling precision and ride comfort. A revised geometry lowered the car’s ride height by 7 mm, contributing to a lower center of gravity and improved stability. The diameter of the stabilizer bars was increased on both models, and the front strut tower bar on the Type-S was also enlarged. Additionally, bushings at the suspension installation points were optimized, and on the Type-S, these bushings were replaced with bearings on the strut tower mounts, resulting in quicker turn-in response. To minimize the influence of suspension compression on steering feel, inversely wound front coil springs were implemented.
Large disc brakes on all four wheels ensure exceptional stopping power. The standard RSX features 10.3-inch ventilated discs at the front, while the high-performance Type-S boasts larger 11.8-inch ventilated discs for even greater braking capacity. Both models are equipped with 10.2-inch rotors at the rear. The brake systems across the RSX range were further refined for 2005 with a reduced pedal stroke ratio, a more rigid brake pedal, and a larger diameter master cylinder, all contributing to enhanced braking performance and superior pedal feel.
The robust unit body of the RSX was initially engineered to set a new benchmark for torsional and bending rigidity. This standard was elevated further for 2005 through the reinforcement of key points on the body and chassis. Exterior styling was also updated for 2005, resulting in a more distinctive and sporty aesthetic. Enhancements such as redesigned front and rear fascias, new side sills, redesigned head and taillight assemblies, and the addition of a deck lid spoiler on the Type-S model contribute to this refreshed look. These styling changes, in conjunction with the suspension modifications, also help to reduce both the coefficient of drag and coefficient of lift, enhancing high-speed stability.
The RSX platform was computer-designed to achieve a 5-star NCAP rating for frontal impact from the National Highway Traffic Safety Administration (NHTSA). Specially engineered crumple zones in the front and rear are designed to effectively dissipate impact forces before they reach the passenger cabin. Furthermore, impact-absorbing pads located in the pillars, roof sides, and door linings work in concert with the standard front and side airbags to minimize the risk of occupant injury in the event of a collision.
Spacious and Stylish Cockpit: Driver-Focused Design
Despite its compact 101.2-inch wheelbase, the RSX offers generous interior space for both passengers and cargo, thanks in part to its space-efficient compact suspension system and cab-forward design. With the rear seats in the upright position, the cargo area provides a practical 16 cubic feet of storage capacity.
The driver-oriented cockpit was refreshed for 2005 with new chrome and titanium-look accents and upgraded materials throughout, creating a more premium feel. It features a sleek instrument panel with large, easy-to-read gauges backlit in red for excellent nighttime visibility. Both RSX models are equipped with deeply bolstered front seats, redesigned for 2005 with increased support and comfort in mind. A three-spoke, leather-wrapped steering wheel further reinforces the “driver’s car” feel. Handsome, double-knit material with patterned-cloth center inserts is standard on the RSX, while perforated, hand-selected leather is available as an option. Perforated leather upholstery is standard on the RSX Type-S, adding a touch of luxury to the performance-oriented model.
Standard Luxury Features: Premium Amenities
In keeping with Acura’s commitment to comprehensive equipment levels, the RSX comes generously equipped with standard luxury features. These include an Automatic Climate Control system with air filtration, a keyless entry and security system with an anti-theft engine immobilizer, power windows with a convenient “auto-up/down” feature for the driver’s window, heated power sideview mirrors, and intermittent wipers. For audio enjoyment, the RSX features a standard 6-speaker audio system with an in-dash CD player. The RSX Type-S elevates the audio experience with an even more impressive 7-speaker Acura/Bose® Music System, complete with a 6-disc in-dash CD changer and cassette player.
Sporty and Aerodynamic Exterior Design: Form Follows Function
For 2005, the RSX’s exterior styling was enhanced to project a sportier and more dynamic presence. The grille, front and rear bumpers, side sills, headlights, and taillights were all redesigned, building upon the already sporty appeal of the previous model and ensuring the RSX visually communicates its performance capabilities.
Thanks to its subtly tapered body-side panels, curved door and quarter-panel glass, and a suspension lowered by 7 mm for 2005, the RSX stands out as the most aerodynamic coupe in its class. Improvements to the coefficient of lift and coefficient of drag for 2005, along with an enhanced front-to-rear lift ratio, contribute to maximized high-speed stability and aerodynamic efficiency.
The 2005 Acura RSX was available in a range of exterior colors including Taffeta White, Nighthawk Black, Satin Silver Metallic, Premium White Pearl (Type-S exclusive), and Milano Red. Four new exterior color options were introduced for 2005: Magnesium Metallic, Vivid Blue Pearl, Jade Green Metallic, and Blaze Orange Metallic, replacing the previous Artic Blue Pearl, Eternal Blue Pearl, and Desert Silver Metallic. These new colors further enhanced the visual appeal and customization options for the 2005 Acura RSX lineup, especially the dynamic 2005 Acura RSX Type S.
