1991 Mitsubishi Sigma 2.5 25E Specs

OVERVIEW

With a fuel consumption of 20.6 mpg US - 24.7 mpg UK - 11.4 L/100km, a weight of 3262 lbs (1480 kg), the Mitsubishi Sigma 2.5 25E has a water cooling V-type 6 cylinder DOHC engine, a High octane premium gasoline engine 6G73. This engine 6G73 produces a maximum power of 177.4 PS (175 bhp - 130.4 kW) at 6000 rpm and a maximum torque of 221.6 Nm (163.4 lb.ft - 22.6 kg.m) at 4500 rpm. The engine power is transmitted to the road by the front wheel drive (FF) with a 4AT gearbox. For stopping power, the Mitsubishi Sigma 2.5 25E braking system includes Disk at the rear and Ventilated disk at the front. Stock tire sizes are 195/70 on 14 inch rims 90S at the rear and 195/70 on 14 inch rims 90S at the front. Chassis details - Mitsubishi Sigma 2.5 25E has multi link rear suspension and McPherson strut front suspension for road holding and ride confort.

Add to compare list

- Present
- Option
- Not Present (or Dealer Option)

• Search Car Specs
• Other Sigma Specs Database

More photos Mitsubishi Sigma

By Brian Wong, Reviewed by: Kurt Niebuhr, Updated on April 18, 2024

Introduction to the 1991-1992 Mitsubishi Sigma 2.5 25E

The 1991-1992 Mitsubishi Sigma 2.5 25E represents a notable entry into the automotive market during that era. With a production run spanning from October 1991 to September 1992, this sedan was designed to cater to drivers seeking a blend of style, performance, and practicality.

One of the key features of the Mitsubishi Sigma 2.5 25E is its front-wheel-drive (FF) setup, providing reliable traction and drivetrain dynamics. This sedan was engineered with a 4-speed automatic transmission (4AT), ensuring smooth and hassle-free gear transitions.

Under the hood, you'll find a 2.5-liter, 6-cylinder DOHC engine with the engine code 6G73. This powerplant delivered a robust 175 horsepower at 6000 rpm and a peak torque of 163.4 lb.ft at 4500 rpm. Running on high-octane premium gasoline, it offered an impressive balance of power and efficiency.

In terms of dimensions, the Mitsubishi Sigma 2.5 25E boasted an exterior length of 474 cm, a width of 177.5 cm, and a height of 143.5 cm. Inside the cabin, passengers enjoyed a spacious environment with an interior length of 187 cm, a width of 145 cm, and a height of 116.5 cm. The car featured a comfortable seating arrangement for up to five occupants, with four doors providing easy access.

Equipped with McPherson strut front suspension and a multi-link rear suspension system, the Sigma 2.5 25E ensured a smooth and stable ride. Its ventilated disk front brakes and disk rear brakes offered reliable stopping power, while the 195/70 R14 90S tires on both the front and rear provided good traction.

In terms of exterior features, the Mitsubishi Sigma 2.5 25E offered front fog lamps for improved visibility in adverse conditions. While it didn't have a sunroof, an optional tilt sunroof was available. The sedan also featured power-adjustable door mirrors.

Inside the cabin, standard amenities included power windows, power steering, and a tachometer. Centralized door locking provided convenience, and the steering wheel was adjustable, offering both tilt and telescopic adjustments. While leather seats and advanced features like cruise control were not part of the package, the car offered a practical and functional interior.

Safety-wise, the Mitsubishi Sigma 2.5 25E featured standard side impact bars and a 3-point safety belt system. It did not include airbags or advanced safety technologies like TCS or brake assist, reflecting the safety standards of its time.

In summary, the 1991-1992 Mitsubishi Sigma 2.5 25E was a sedan that offered a balanced combination of performance, comfort, and practicality. Its unique blend of features and specifications made it a notable choice for drivers in its era.

Engine Specifications

The heart of the 1991-1992 Mitsubishi Sigma 2.5 25E lies in its impressive engine specifications. This sedan was equipped with a robust powerplant designed to deliver a blend of performance and efficiency.

Under the hood, you'll find a 2.5-liter, V-type 6-cylinder DOHC engine with the engine code 6G73. This engine was capable of producing a substantial 175 horsepower at 6000 rpm, providing the Sigma 2.5 25E with ample power for its class. It's important to note that this power output was achieved using high-octane premium gasoline.

In terms of torque, the engine delivered a peak of 163.4 lb.ft (pound-feet) or 22.6 kg.m (kilogram-meters) at 4500 rpm. This torque figure ensured good acceleration and responsiveness in various driving conditions.

The engine featured a compression ratio of 10, contributing to its efficiency and power delivery. With a bore of 8.4 cm and a stroke of 7.6 cm, it offered a well-balanced design that optimized performance.

Mated to a 4-speed automatic transmission (4AT), this engine provided smooth and efficient gear shifts, enhancing the overall driving experience of the Mitsubishi Sigma 2.5 25E.

While exact fuel consumption figures may vary depending on driving conditions and other factors, the Sigma 2.5 25E was designed to offer respectable fuel efficiency. In the 10/15 mode, it achieved approximately 20.6 mpg (US) or 24.7 mpg (UK) or 11.4 L/100km. In the 60 km/h mode, it delivered even better fuel economy, with figures of around 40.5 mpg (US) or 48.7 mpg (UK) or 5.8 L/100km.

These engine specifications made the 1991-1992 Mitsubishi Sigma 2.5 25E a well-rounded sedan, combining power and efficiency to meet the demands of drivers during its production period.

Dimensions and Sizes

The 1991-1992 Mitsubishi Sigma 2.5 25E boasted dimensions and sizes that contributed to its distinctive presence on the road. This sedan offered a comfortable interior and a well-proportioned exterior.

Starting with the exterior, the Sigma 2.5 25E measured approximately 474 cm (186.61 inches) in length. Its width spanned about 177.5 cm (69.88 inches), while the height stood at approximately 143.5 cm (56.49 inches). These dimensions gave the car a balanced and sleek appearance, making it well-suited for urban and highway driving.

Inside the cabin, passengers enjoyed a spacious environment. The interior length measured around 187 cm (73.62 inches), providing ample legroom for occupants. The width of approximately 145 cm (57.08 inches) allowed for comfortable seating arrangements, and the interior height of roughly 116.5 cm (45.86 inches) provided adequate headroom.

The wheelbase of the Sigma 2.5 25E extended to about 272 cm (107.08 inches), contributing to stability and ride comfort. The front and rear axles had similar lengths, with the front measuring approximately 153.5 cm (60.43 inches) and the rear about 153 cm (60.23 inches).

The ride height, or ground clearance, stood at around 16.5 cm (6.49 inches), striking a balance between maneuverability and clearance over obstacles.

In terms of weight, the Mitsubishi Sigma 2.5 25E had a curb weight of approximately 1480 kg (3262 lbs), which played a role in its overall performance and fuel efficiency.

With seating for up to five passengers and four doors for easy access, this sedan offered practicality for both driver and passengers. The turning circle, or turning diameter, was approximately 5.6 meters, enhancing its maneuverability in urban settings.

To complement its size and dimensions, the Sigma 2.5 25E featured a fuel tank with a capacity of 19 US gallons or 15.8 UK gallons or 72 liters, allowing for decent driving range between refueling stops.

These dimensions and sizes made the 1991-1992 Mitsubishi Sigma 2.5 25E a well-proportioned sedan, suitable for various driving needs while providing comfort and style.

Fuel Tank Capacity

The fuel tank capacity of the 1991-1992 Mitsubishi Sigma 2.5 25E was a notable feature, offering a sufficient reservoir for extended journeys without frequent refueling stops.

This sedan came equipped with a fuel tank capable of holding approximately 19 US gallons, which is equivalent to about 15.8 UK gallons or 72 liters of fuel. This generous fuel tank capacity allowed the Sigma 2.5 25E to cover considerable distances between fill-ups, making it suitable for both daily commuting and longer road trips.

The ample fuel tank capacity, combined with the sedan's balanced performance and fuel efficiency, made it a practical choice for drivers who valued convenience and the ability to go the extra mile without the constant need for refueling.

Fuel Consumption

Fuel consumption is a critical consideration for any vehicle, and the 1991-1992 Mitsubishi Sigma 2.5 25E aimed to strike a balance between performance and efficiency.

In the 10/15 mode, which represents urban and suburban driving conditions, the Sigma 2.5 25E achieved approximately 20.6 mpg (US) or 24.7 mpg (UK) or 11.4 L/100km. These figures demonstrated its ability to deliver reasonable fuel efficiency during stop-and-go city driving.

When it came to more highway-oriented driving conditions at 60 km/h (approximately 37 mph), this sedan excelled further. It boasted fuel consumption figures of around 40.5 mpg (US) or 48.7 mpg (UK) or 5.8 L/100km. This level of efficiency made it an appealing choice for long-distance cruising and highway journeys.

The Mitsubishi Sigma 2.5 25E's fuel consumption figures reflected its design focus on providing both power and economical operation, offering drivers versatility in their driving experience based on their specific needs and preferences.

Fuel Capacity

The 1991-1992 Mitsubishi Sigma 2.5 25E was equipped with a fuel tank that offered ample capacity to support its performance and driving range. While exact figures may vary depending on the region and market specifications, this sedan typically featured a fuel tank with a capacity of around 19 US gallons, which is equivalent to approximately 15.8 UK gallons or 72 liters.

This generous fuel capacity allowed the Sigma 2.5 25E to cover substantial distances on a single tank of fuel, reducing the need for frequent refueling stops during long journeys. It catered to drivers who valued convenience and the ability to travel extended distances without interruption, making it a practical choice for both daily commuting and road trips.

Fuel Average (MPG)

The fuel efficiency of the 1991-1992 Mitsubishi Sigma 2.5 25E, measured in miles per gallon (MPG), showcased its ability to balance power and economy.

In urban and suburban driving conditions, often characterized by stop-and-go traffic and lower speeds, the Sigma 2.5 25E achieved an approximate fuel average of 20.6 mpg (US) or 24.7 mpg (UK) or 11.4 L/100km in the 10/15 mode. This indicated its capability to deliver reasonable fuel economy for everyday city commuting.

When the driving conditions shifted to a more highway-oriented setting at speeds around 60 km/h (approximately 37 mph), this sedan excelled in fuel efficiency. It recorded an impressive fuel average of around 40.5 mpg (US) or 48.7 mpg (UK) or 5.8 L/100km, making it an attractive option for long-distance cruising and highway journeys.

The Mitsubishi Sigma 2.5 25E's fuel averages reflected its versatility, catering to the needs of drivers who sought both efficient city driving and economical highway travel, providing a well-rounded driving experience.

Wheel Information

The wheels of the 1991-1992 Mitsubishi Sigma 2.5 25E played a significant role in its overall performance and handling characteristics. Here's a closer look at the wheel information for this sedan:

Front and Rear Tires: The Sigma 2.5 25E featured identical front and rear tire specifications. The tires were sized at 195/70 R14 90S. These tires provided a balance of comfort and performance, with a width of 195 mm, a sidewall aspect ratio of 70, and a 14-inch rim diameter. The "90S" rating indicates the load capacity and speed rating of the tires, ensuring stability and safety during various driving conditions.

Rims: The rims for these tires were designed to accommodate the 14-inch tire diameter. While specific rim design and material may vary depending on the manufacturer's specifications and optional packages, they complemented the overall aesthetics and performance of the Sigma 2.5 25E.

Tire Type: The "R" in the tire size indicates that these were radial tires, a common and popular choice known for their durability and improved handling characteristics.

The wheel information, including tire size and type, contributed to the sedan's ride comfort, stability, and road-handling capabilities. It ensured that the Mitsubishi Sigma 2.5 25E offered a well-rounded driving experience suitable for various road conditions.

Trim Levels and Generations

The 1991-1992 Mitsubishi Sigma 2.5 25E was part of a lineup that included various trim levels and belonged to a specific generation of the Sigma model series. Here, we delve into the details of its trim levels and the broader context of its generation:

Trim Levels: The Sigma 2.5 25E was one of the available trim levels for this particular model during the specified years. While it may have had variations and additional packages, the 25E trim was notable for its 2.5-liter engine and a well-rounded set of features. Depending on the market and regional specifications, these trim levels might have had distinct options and features, catering to a range of customer preferences.

Generations: The 1991-1992 Mitsubishi Sigma 2.5 25E was part of the second generation of the Mitsubishi Sigma series, also known as the Mitsubishi Diamante in some markets. This generation introduced a sleeker and more aerodynamic design compared to its predecessor. It aimed to provide a blend of style, comfort, and performance, aligning with the automotive trends of the early 1990s.

The second-generation Sigma/Diamante models underwent various updates and refinements compared to their first-generation counterparts. These included changes in exterior design, interior features, and mechanical enhancements to enhance overall driving experience and market competitiveness.

The Sigma 2.5 25E, as part of this second generation, represented a step forward in terms of design, technology, and performance within the Mitsubishi Sigma lineup. It catered to drivers seeking a well-rounded sedan with a focus on comfort, reliability, and a balance between power and fuel efficiency.

Understanding the trim levels and the generation of the 1991-1992 Mitsubishi Sigma 2.5 25E provides context for its features and specifications, helping potential buyers and automotive enthusiasts appreciate its place in Mitsubishi's history and product lineup.

Model Variations

The 1991-1992 Mitsubishi Sigma 2.5 25E offered various model variations and options to cater to a diverse range of preferences and requirements among potential buyers. These model variations allowed customers to choose the features and specifications that best suited their needs. Here's an overview of some of the notable model variations:

1. Standard Model: The standard 1991-1992 Mitsubishi Sigma 2.5 25E model provided the core features and specifications, including the 2.5-liter engine, 4-speed automatic transmission, and a well-appointed interior. This model aimed to strike a balance between performance and practicality, offering a comfortable and reliable sedan for daily use.

2. Optional Packages: Depending on the market and regional availability, Mitsubishi may have offered optional packages that allowed buyers to customize their Sigma 2.5 25E further. These packages could include features such as upgraded audio systems, enhanced interior trim, and additional safety or convenience features.

3. Special Editions: Some markets may have introduced special edition versions of the Sigma 2.5 25E during these years. Special editions often included unique exterior and interior styling elements, exclusive color options, and sometimes limited-production badges to distinguish them from the standard models.

4. Sportier Variants: In certain regions, Mitsubishi might have offered sportier variants of the Sigma 2.5 25E with features such as alloy wheels, sport-tuned suspensions, and sportier interior elements. These variants were designed to appeal to drivers who sought a more dynamic driving experience.

5. Safety and Technology Packages: Mitsubishi could have introduced safety and technology-focused packages for the Sigma 2.5 25E. These packages might have included advanced safety features like ABS brakes or technology upgrades such as an advanced audio system or navigation system.

6. Limited Editions: Limited edition models of the Sigma 2.5 25E may have been introduced with unique styling cues, special badging, and exclusive features. These limited editions often catered to collectors and enthusiasts looking for a distinctive vehicle.

It's important to note that the availability of these model variations and options could vary by region and market conditions. Buyers in different parts of the world may have had access to specific model variations and features based on their preferences and local regulations. Mitsubishi aimed to offer a range of choices within the Sigma 2.5 25E lineup to accommodate diverse customer needs and tastes.

Performance Features

The 1991-1992 Mitsubishi Sigma 2.5 25E came equipped with a range of performance features designed to deliver a balanced and enjoyable driving experience. These features contributed to the sedan's reputation for reliability and responsive handling:

1. Engine Power: At the heart of the Sigma 2.5 25E was a 2.5-liter V6 engine with a power output of approximately 175 horsepower. This engine provided ample acceleration and highway cruising capabilities, making it suitable for a variety of driving scenarios.

2. Automatic Transmission: The sedan was paired with a 4-speed automatic transmission (4AT), ensuring smooth and efficient gear changes. This transmission contributed to a hassle-free driving experience, particularly in urban traffic conditions.

3. Suspension System: The front suspension system featured McPherson struts, while the rear suspension utilized a multi-link setup. This combination offered a good balance between ride comfort and handling stability, providing confidence on various road surfaces.

4. Braking System: The Sigma 2.5 25E was equipped with ventilated front disc brakes and rear disc brakes. These brakes provided reliable stopping power and contributed to overall safety and control while driving.

5. Tires and Wheels: The sedan came with 195/70 R14 90S tires, which struck a balance between ride comfort and grip. The matching front and rear tire dimensions ensured consistent performance.

6. Front Fog Lamps: The presence of front fog lamps enhanced visibility in adverse weather conditions, improving safety during foggy or misty drives.

7. Power-Adjustable Door Mirrors: The exterior mirrors were power-adjustable, allowing the driver to customize the mirror position for optimal visibility and convenience.

These performance features collectively contributed to the Mitsubishi Sigma 2.5 25E's reputation as a reliable and well-rounded sedan. Whether for daily commuting or longer journeys, these features enhanced the sedan's overall driving dynamics and made it a competitive choice in its class during its production years.

Interior and Comfort

The interior of the 1991-1992 Mitsubishi Sigma 2.5 25E was designed with a focus on comfort, functionality, and passenger convenience. Here's a detailed look at the interior and comfort features of this sedan:

1. Power Windows: The sedan came equipped with power windows, offering the convenience of one-touch operation for all four windows. This feature allowed passengers to easily control the windows, enhancing ventilation and comfort.

2. Power Steering: Power steering was a standard feature, contributing to effortless steering and maneuverability, particularly in parking and low-speed driving situations.

3. Tachometer: A tachometer was included in the instrument cluster, providing the driver with information about the engine's RPM (revolutions per minute). This feature aided in monitoring engine performance and gear shifts.

4. Centralized Door Lock: The centralized door lock system allowed the driver to lock or unlock all doors simultaneously, adding to the convenience and safety of the vehicle.

5. Adjustable Steering Wheel: The steering wheel was adjustable, offering both tilt and telescopic adjustments. This allowed drivers to customize the steering wheel's position for optimal comfort and control.

6. Interior Space: The interior of the Sigma 2.5 25E provided ample space for passengers. With dimensions that accommodated five occupants comfortably, it offered a roomy environment for both short trips and longer journeys.

7. Air Conditioning: The sedan featured an automatic air conditioning system, ensuring a comfortable interior temperature regardless of external weather conditions.

8. Radio: A standard radio was included in the interior setup, offering entertainment and connectivity options for passengers.

9. Optional Audio Upgrades: Depending on the market and optional packages, buyers could opt for audio system upgrades, which might have included features like cassette players, CD players, or more advanced audio configurations.

10. Power Adjustable Seats: The Sigma 2.5 25E typically did not include power-adjustable seats, but this feature might have been available as an option in certain markets.

Overall, the interior and comfort features of the 1991-1992 Mitsubishi Sigma 2.5 25E aimed to provide a pleasant and convenient driving experience. With attention to passenger comfort, interior space, and essential amenities, this sedan was designed to meet the needs of drivers and passengers alike.

Exterior Design

The exterior design of the 1991-1992 Mitsubishi Sigma 2.5 25E was notable for its sleek and aerodynamic styling, which contributed to both its visual appeal and overall performance. Here are the key features and aspects of its exterior design:

1. Aerodynamic Shape: The Sigma 2.5 25E embraced a modern and aerodynamic silhouette, characterized by its smoothly contoured body lines and gently sloping roofline. This design approach aimed to reduce drag and enhance fuel efficiency while also improving the car's stability at higher speeds.

2. Grille and Headlights: At the front, the sedan featured a well-defined grille and headlight design. The grille typically incorporated the Mitsubishi logo and added a sense of refinement to the vehicle's front fascia. The headlights were designed to provide optimal illumination while complementing the overall aesthetics.

3. Body Panels: The Sigma 2.5 25E had clean and uncluttered body panels, contributing to its elegant and timeless appearance. The absence of excessive detailing emphasized the car's understated sophistication.

4. Side Mirrors: The exterior mirrors, often matched to the body color, were strategically positioned for visibility and aerodynamic efficiency.

5. Wheel Design: Depending on the market and trim level, the sedan was equipped with a set of alloy or steel wheels that complemented the overall look. The wheel design added a touch of style to the vehicle's profile.

6. Door Handles: The door handles were designed for functionality and ease of use, with a design that blended seamlessly into the vehicle's exterior.

7. Rear Design: The rear of the Sigma 2.5 25E followed the same aerodynamic principles as the front, with a focus on reducing turbulence and improving fuel efficiency. Tail lights were designed for visibility and safety.

8. Paint Options: Mitsubishi typically offered a range of exterior paint colors to allow buyers to choose the finish that best suited their preferences.

9. Sunroof Option: Some variants of the Sigma 2.5 25E may have offered a sunroof as an option, allowing for open-air driving and an enhanced sense of space within the cabin.

The exterior design of the 1991-1992 Mitsubishi Sigma 2.5 25E reflected a balance of form and function. Its aerodynamic styling, attention to detail, and clean lines contributed to its timeless appeal and its ability to perform efficiently on the road.

Maintenance and Reliability

Maintenance and reliability are essential aspects of the 1991-1992 Mitsubishi Sigma 2.5 25E, contributing to its long-lasting performance and owner satisfaction. Here's a detailed look at these factors:

Regular Maintenance: To ensure the continued reliability and optimal performance of the Sigma 2.5 25E, it's crucial to adhere to a regular maintenance schedule. This includes routine tasks such as oil changes, air filter replacements, and brake inspections. Regular maintenance helps identify and address minor issues before they become major problems.

Engine and Mechanical Components: The sedan was equipped with a well-engineered 2.5-liter V6 engine, known for its durability and longevity when properly maintained. Regular oil changes, coolant checks, and belt inspections were vital for engine health. Additionally, maintaining the transmission and suspension components contributed to overall reliability.

Quality Parts: Using high-quality replacement parts and fluids during maintenance and repairs was essential. Genuine Mitsubishi parts or reputable aftermarket alternatives ensured that the vehicle continued to operate at its best.

Electrical System: Regular checks of the electrical system, including the battery, alternator, and wiring, were necessary to prevent electrical issues. Ensuring that all lights, signals, and accessories functioned correctly added to safety and reliability.

Tire Maintenance: Proper tire maintenance, including regular rotations, wheel alignments, and maintaining the recommended tire pressure, extended tire life and contributed to safety and fuel efficiency.

Safety Inspections: Periodic safety inspections, including brake checks, steering and suspension inspections, and examination of safety features like seatbelts and airbags, were crucial for occupant safety and overall vehicle reliability.

Rust Prevention: Depending on the climate and geographical location, rust prevention measures, such as undercoating and rust-proofing, could be valuable in preserving the vehicle's structural integrity.

Owner's Manual: Adhering to the manufacturer's recommendations and guidelines as outlined in the owner's manual was essential for proper maintenance and reliability. The manual provided valuable information on service intervals and maintenance procedures.

Professional Service: Seeking the services of qualified and experienced automotive technicians for repairs and maintenance tasks ensured that the work was carried out correctly and according to manufacturer specifications.

The 1991-1992 Mitsubishi Sigma 2.5 25E, when properly maintained and serviced, exhibited a high level of reliability and longevity. Regular care and attention to maintenance tasks were key to preserving the vehicle's performance, safety, and overall satisfaction for its owners.

Conclusion

In conclusion, the 1991-1992 Mitsubishi Sigma 2.5 25E represented a well-rounded and reliable sedan option during its production years. With a focus on providing a balanced driving experience, it offered a blend of performance, comfort, and practicality that appealed to a wide range of drivers.

The sedan's 2.5-liter V6 engine provided ample power for daily commuting and highway cruising, while its aerodynamic design contributed to fuel efficiency and stability. The inclusion of features like power windows, air conditioning, and power steering added to the convenience and comfort of the interior.

Safety features such as front disc brakes, safety belt systems, and the body's structural design prioritized occupant safety. Additionally, the availability of optional features and packages allowed buyers to customize their vehicles according to their preferences.

Maintaining the Sigma 2.5 25E through regular service and adhering to recommended maintenance schedules was key to its longevity and reliability. Proper care and attention ensured that the sedan continued to perform well on the road and retained its value over time.

Overall, the 1991-1992 Mitsubishi Sigma 2.5 25E stood as a testament to Mitsubishi's commitment to producing dependable and versatile vehicles. Its combination of performance, comfort, and reliability made it a practical choice for those seeking a well-rounded sedan for their transportation needs.

Frequently Asked Questions (FAQ) about the 1991-1992 Mitsubishi Sigma 2.5 25E

Mitsubishi Sigma Problems