1977 Mercury Cougar IV (XR7) Dimensions, Size & Specs

Production
Model Year:1977
Production Years:1977 - 1979 discontinued in 1979
Useful Information

About 1977 Mercury Cougar IV

The 1977 Mercury Cougar IV (XR7) represents the fourth generation of Mercury's iconic mid-size muscle car and was produced from 1977 through 1979. This generation stood out with its sleek coupe body style, emphasizing a blend of sporty design and personal luxury typical of late-1970s American vehicles. As a luxurious variant, the XR7 trim featured distinctive interior upgrades, enhanced comfort, and unique exterior styling elements that set it apart from the standard Cougar models.

Dimension-wise, the 1977 Mercury Cougar IV featured an approximate length of 5,032 millimeters (198 inches), a width near 1,981 millimeters (78 inches), and a height around 1,320 millimeters (52 inches). This size classifies it firmly within the mid-size coupe segment, offering a balanced footprint that provided both road presence and easy maneuverability. The wheelbase measured roughly 2,794 millimeters (110 inches), which helped deliver stable handling and a comfortable ride.

The vehicle's design included a long hood and a short rear deck, characteristic of muscle cars of the era, lending the Cougar IV a powerful and aggressive stance. Under the hood, the XR7 trims typically housed V8 engine options, delivering the performance expected from Mercury's sporty lineup. The Mercury Cougar IV was well-regarded for its smooth ride, refined interior touches, and the combination of muscle car performance with coupe elegance.

In conclusion, the 1977 Mercury Cougar IV (XR7) coupe remains a classic example of American muscle and luxury combined, offering distinctive styling and respectable dimensions suitable for enthusiasts seeking a vintage, aggressively styled yet comfortable coupe from the late 1970s.

Exceptional Features

1977 Mercury Cougar IV Highlights

Discover the standout features that make the 1977 Mercury Cougar IV a leader in its class

Engine Options

The 1977 Mercury Cougar IV (XR7) offered a range of engine options including a standard 4.9L V8 and an optional 5.8L V8, providing a balance between performance and daily drivability.

Distinctive Styling

The XR7 trim featured unique styling elements such as hidden headlamps, a plush vinyl roof, and XR7 badging, giving it a luxurious and sporty appearance.

Comfort and Luxury

The Cougar XR7 was equipped with high-back bucket seats, woodgrain interior accents, and optional air conditioning, emphasizing comfort and upscale features.

Safety Features

Included standard safety features such as front and rear seat belts, energy-absorbing steering column, and optional anti-lock braking system for enhanced driver and passenger protection.

Handling and Suspension

The suspension system was tuned for improved handling with front and rear stabilizer bars and heavy-duty shocks, ensuring a smooth and controlled driving experience.
Frequently Asked Questions

FAQ

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The Mercury Cougar IV (XR7) produced between 1977 and 1979 measures approximately 5,181 mm (204 inches) in length, 1,854 mm (73 inches) in width, and around 1,326 mm (52.2 inches) in height. These dimensions reflect its design as a mid-to-large size personal luxury coupe popular during that era, offering a spacious cabin while maintaining a sleek profile. Its size made it competitive among the luxury coupes of the late 1970s, providing a comfortable driving experience combined with a bold road presence.

Compared to the previous Mercury Cougar III generation (1974-1976), the Cougar IV (XR7) shifted to a somewhat smaller and lighter design, reflecting industry trends toward more fuel-efficient cars during the late 1970s. The Cougar IV is shorter and narrower than its predecessor, with a length reduction of approximately 200 mm (around 8 inches) and slightly narrower width. This downsizing helped improve maneuverability and fuel economy, while still retaining its luxury coupe appeal. The reduction in size did, however, slightly affect interior and trunk space compared to the larger previous generation.

Yes, the Mercury Cougar IV (XR7) fits comfortably into a standard home garage. With its width of about 1,854 mm (73 inches) and length of 5,181 mm (204 inches), it's within the typical size limitations of most residential garages designed to accommodate passenger vehicles. Most standard garages have widths between 2,400 mm (approximately 96 inches) to 3,000 mm (118 inches) and lengths from 5,500 mm (216 inches) to 6,000 mm (236 inches), so the Cougar IV's dimensions allow for easy parking with ample room for door opening and movement around the car.

The curb weight of the Mercury Cougar IV (XR7) varies depending on engine and trim, but typically falls between 1,730 to 1,850 kg (approximately 3,815 to 4,080 lbs). This weight reflects the coupe's solid construction, luxury features, and the heavier V8 engine options available during this model period. While heavier than many modern coupes, this weight was typical for mid-to-large American luxury cars of the 1970s, balancing power, comfort, and durability.

The Mercury Cougar IV (XR7) features seating for four passengers with a two-door coupe layout emphasizing comfort and style for front and rear occupants. Interior dimensions offer adequate legroom and headroom in both front and rear seats, typical for a personal luxury coupe of its time. Though exact interior measurements vary slightly, the seating arrangement balances passenger comfort with the sporty coupe design, providing a cozy but refined cabin environment suitable for long drives and daily use.

The 1977 Mercury Cougar IV (XR7) was competitively sized among American personal luxury coupes such as the Ford Thunderbird, Pontiac Grand Prix, and Buick Regal of the late 1970s. Its length of about 5,181 mm (204 inches) and width near 1,854 mm (73 inches) placed it in the mid-range size category—slightly smaller than the Thunderbird but larger than many European coupes of the same era. The Cougar IV balanced spacious interiors and prominent road presence, offering customers a mix of luxury and sportiness comparable to its direct competitors in the personal luxury coupe segment.

The Mercury Cougar IV (XR7) coupe provides a reasonably spacious trunk that accommodates typical luggage and storage needs for a mid-sized luxury coupe from the late 1970s. While exact volume figures vary, the trunk space is designed to support weekend trips and everyday utility without sacrificing the coupe's sleek styling. Its rear seat pass-through capabilities in some models may allow for the transport of longer items, increasing cargo flexibility for owners.

The Mercury Cougar IV (XR7) utilizes a body-on-frame construction typical of the era, with independent front suspension and a solid rear axle with leaf springs. The relatively wide track and balanced wheelbase dimensions contribute to a smooth and stable ride, prioritizing comfort over sporty handling. This design supports the Cougar's role as a personal luxury coupe by reducing road noise and vibration, although it may not offer the tight cornering performance of smaller, more modern coupes. The suspension was engineered to provide a comfortable ride suited to highway cruising and daily driving.

The 1977 Mercury Cougar IV (XR7) is equipped with a fuel tank holding approximately 73 liters (around 19.3 US gallons), which was typical for full-size coupes of that period. Fuel economy largely depended on the engine choice, commonly V8s that generally achieved around 10 to 14 liters per 100 kilometers (roughly 17 to 23 miles per gallon). While fuel consumption was higher compared to contemporary smaller vehicles, this was standard for American personal luxury coupes in the late 1970s, reflecting the design priorities of performance and comfort.

With a length of approximately 5,181 mm (204 inches) and a width of 1,854 mm (73 inches), the Mercury Cougar IV (XR7) offers a sizeable but manageable footprint for urban driving and parking. Its width requires some consideration when navigating narrow city streets or tight parking spaces, but overall it remains practical given its coupe form. The vehicle's dimensions strike a balance that provides comfortable interior space without the unwieldy proportions of larger luxury sedans, making it suitable for suburban and city environments with cautious maneuvering.