When the redesigned coupe debuted, gearheads instantly noticed how radically different the lineup was under the hood. The 1995 Mitsubishi Eclipse split into two distinct mechanical identities: the naturally aspirated commuter trims and the heavy-hitting turbocharged variants built at the Diamond-Star Motors plant in Normal, Illinois. If you're trying to figure out whether a base model or a forced-induction version fits your garage goals, looking past the slick body lines reveals completely different engines, transmissions, and suspension setups.
Choosing between these models means understanding that an RS or GS shared very little mechanically with a GS-T or GSX aside from exterior sheet metal. Let's break down the exact mechanical split between the naturally aspirated and turbocharged 1995 Eclipse lineup, examining performance limits, common failure points, and what living with each version actually entails.
Engine Architecture: 420A vs 4G63
The biggest separator in the 1995 lineup lived right in the engine bay. Mitsubishi didn't just strap a turbocharger onto a base motor; they used entirely separate engine families depending on the trim level.
- Naturally Aspirated Trims (RS and GS): These models received the Chrysler-designed 2.0-liter 420A dual-overhead-cam engine, pushing out 140 horsepower at 6,000 rpm and 130 lb-ft of torque. It featured an aluminum block design and lacked balance shafts, making it feel rev-happy but light on low-end grunt.
- Turbo Trims (GS-T and GSX): These variants carried the legendary Mitsubishi 4G63T 2.0-liter cast-iron block engine. Equipped with a Garrett T25 turbocharger and an intercooler, it pumped out 210 horsepower and 214 lb-ft of torque in manual configurations.
Transmission and Drivetrain Layouts
Power delivery completely changes how these cars behave on asphalt. The drivetrain options dictate not only straight-line acceleration but also weight distribution and chassis dynamics.
The naturally aspirated RS and GS came standard with a 5-speed manual or a sluggish 4-speed automatic, sending power exclusively to the front wheels via a lighter transmission housing.
The GS-T utilized a beefier front-wheel-drive layout with a stronger 5-speed manual transmission to handle the sudden torque spike of the turbo spooling up around 3,000 rpm. Meanwhile, the GSX added an all-wheel-drive system derived closely from rally heritage, using a viscous coupling center differential to split traction across all four corners. That extra hardware added considerable heft, pushing the GSX curb weight past 3,200 pounds compared to the lighter 2,700-pound footprint of the base RS.
Performance Reality Check
On paper, the 210-horsepower turbo models easily outpace the 140-horsepower naturally aspirated cars, but real-world driving highlights sharper contrasts.
- Straight-Line Speed: A stock 1995 GS-T or GSX could sprint from zero to sixty in the mid-to-high six-second range, whereas the 420A-powered GS models typically lagged in the high eights or low nines.
- Handling and Weight: Because the GSX packed an AWD transfer case and driveshaft, it suffered from heavier front-end bias and drivetrain parasitic loss, though it hooked up brilliantly in wet weather. The FWD GS-T offered a purer, lighter steering feel through corners, though torque steer was an active companion under heavy throttle.
Maintenance Realities and Common Failure Points
Keeping one of these vintage hatchbacks on the road requires vigilance, especially given their age and history of modification.
For the 420A engine in the RS and GS, blown head gaskets are a frequent headache if the cooling system isn't meticulously maintained. Timing belt changes are non-negotiable on both engines, but the 4G63 demands careful attention to its balance shaft belt. If the balance shaft belt snaps on a 4G63, it often takes out the main timing belt and destroys the valves.
Turbo models also face issues tied to factory components aging out. The stock Garrett T25 turbochargers are prone to shaft play after decades of heat cycles. Boost leaks from brittle rubber vacuum lines will quickly rob a GS-T of its power, turning a punchy sports coupe into a sluggish cruiser.
Frequently Asked Questions
Can you easily turbocharge a naturally aspirated 1995 Eclipse GS?
Doing a "turbo kit" conversion on a 420A-powered GS is notoriously difficult and unreliable on stock internals. The 420A features weaker pistons and rods than the turbo 4G63 block, meaning high boost will quickly crack the engine lands unless you build the motor completely.
How do I tell if my 1995 Eclipse is a true GS-T or a fake badge job?
Always check the VIN and the firewall identification plate. A genuine GS-T or GSX will feature the 4G63 engine code stamped on the plate, whereas a 420A car has a completely different wiring harness, ECU, and fuel system layout.
Did the 1995 Eclipse automatic transmission handle power well?
The automatic transmissions paired with the turbo models were detuned slightly from the factory, making 205 horsepower instead of 210, to protect the gearsets. They absorb power well for cruising, but enthusiasts heavily prefer the 5-speed manual for performance driving.
Why is the 1995 model year specifically sought after by collectors?
1995 marked the introduction of the clean-sheet second-generation redesign, giving it iconic aggressive styling. Furthermore, early 1995 models missed out on some of the stricter federal OBD-II ECU variations introduced in 1996, making them popular starting points for enthusiast builds. You can read more about vehicle classifications through the National Highway Traffic Safety Administration.
