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1987 Dodge Diplomat Overview, Reviews, Ratings & Specs

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Simon A | June 25, 2026
The 1987 Dodge Diplomat, part of the R-body platform, served as a full-size sedan and station wagon from 1977 to 1989. Known for its spacious interior and comfortable ride, it was a popular choice for families and as a police/taxi vehicle. Key trims included the base Diplomat and the more luxurious S. It offered a blend of traditional American automotive comfort and solid engineering, making it a reliable workhorse.
The Good

The 1987 Dodge Diplomat excels in comfort with its plush seating and smooth ride, appealing to those seeking a relaxed driving experience. Its robust V8 engines offer dependable performance, while the spacious cabin provides practicality. For budget-conscious buyers, its value proposition remains strong, offering substantial size and features for the price.

The Bad

When considering a 1987 Dodge Diplomat, watch out for potential rust, especially in the lower body panels and wheel wells. Electrical gremlins, particularly with aging wiring harnesses and accessory functions, can also be a concern. Fuel economy, while not terrible for its class, is a drawback compared to smaller vehicles.

1987 Dodge Diplomat: Quick Overview

  • Engine Options: The 1987 Dodge Diplomat was primarily offered with two V8 engine options: a 5.2-liter (318 cubic inch) V8 and a larger 5.9-liter (360 cubic inch) V8, though the 360 was less common in later years.
  • Horsepower: The 5.2L V8 typically produced around 130-140 horsepower, while the 5.9L V8 offered slightly more, in the vicinity of 145-160 horsepower, depending on the specific configuration and emissions controls of the year.
  • Fuel Economy: Fuel economy was not a strong suit for this large sedan. Owners typically reported city MPG in the range of 13-16 MPG and highway MPG around 17-20 MPG. This varied significantly based on driving conditions, engine choice, and maintenance.
  • 0-60 Times: Acceleration was leisurely rather than sporty. 0-60 mph times for the 5.2L V8 were generally in the 10-12 second range, with the 5.9L V8 potentially being a second or so quicker.
  • Towing Capacity: While not its primary purpose, the Diplomat, especially when equipped with the proper towing package and the 5.9L V8, could handle moderate towing duties, often rated for around 2,000-3,000 lbs.
  • Trim-Level Features: The base Diplomat offered essential amenities like power steering, power brakes, an automatic transmission, and an AM/FM radio. The Diplomat S trim often added upgrades such as upgraded upholstery, a tilt steering wheel, cruise control, power windows, and power door locks, enhancing the comfort and convenience features.

1987 Dodge Diplomat Specifications

Vehicle Information
Year 1987
Make Dodge
Model Diplomat
Trim -
Style -
Type Sedan
Category Compact Car
Manufacturing Details
Made In United States
Manufacturing City FENTON
Dimensions
Doors 4-Door
Curb Weight -
Gross Vehicle Weight Rating -
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating -
Engine & Performance
Engine 5.2L V8
Engine Size 5.2L
Engine Cylinders 8
Transmission -
Transmission Type -
Transmission Speeds 3-Speed
Drivetrain Rear-Wheel Drive
Additional Features
Anti-Brake System -
Steering Type -
Pricing
Manufacturer Suggested Retail Price (MSRP) -
Invoice Price -
Delivery Charges -

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What Problems Does the 1987 Dodge Diplomat Have?

The 1987 Dodge Diplomat, like many vehicles of its era, is susceptible to certain long-term issues. One of the most common concerns is rust, particularly in areas exposed to salt and moisture, affecting the floor pans, rocker panels, and wheel arches. This can lead to significant structural weakness if not addressed. The Mopar R-body platform itself was robust, but its age means rubber components, such as bushings and hoses, can degrade, leading to leaks or poor handling. The venerable V8 engines are generally reliable, but they can suffer from typical aging issues like oil leaks from valve cover gaskets or oil pan seals. Cooling systems, including radiators and water pumps, may require attention. Electrical issues are also frequently reported. This can manifest as intermittent power to accessories, non-functional gauges, or problems with the ignition system. The wiring harnesses, exposed to heat and time, can become brittle and prone to short circuits. For the 1987 model year specifically, there weren't widespread, model-defining recalls that stood out as chronic problems. However, individual vehicles may have had specific issues addressed through factory recalls related to emissions components or minor safety systems. Routine maintenance is crucial for longevity. Transmission issues, while not endemic, can occur with high mileage, typically manifesting as slipping gears or delayed engagement. Brake components and suspension wear are also standard maintenance items for a vehicle of this age and weight. Overall, while the mechanicals are generally solid, the primary long-term concerns revolve around rust and the aging of various rubber and electrical components.

How long will the 1987 Dodge Diplomat last?

Based on owner data and typical maintenance habits, a well-maintained 1987 Dodge Diplomat can realistically achieve between 200,000 and 250,000 miles, with some surviving well beyond. The long-term durability of the Mopar R-body platform is generally good, especially for the drivetrain. The robust V8 engines and transmissions are known for their longevity when properly cared for with regular fluid changes and tune-ups. However, weaknesses emerge over time, primarily related to rust accumulation in susceptible areas and the natural degradation of rubber and plastic components. Electrical systems can also become more temperamental with age. Vehicles used in harsher climates or those with less diligent maintenance may show significantly more wear and tear, with lower mileage ceilings.

What Technology & Safety Features are Included?

The 1987 Dodge Diplomat offered a functional, if not cutting-edge, array of technology and safety features for its era. The standard entertainment system typically consisted of an AM/FM radio, with optional upgrades including a cassette player, and sometimes a graphic equalizer for a more immersive audio experience. Air conditioning was a common, though not always standard, feature, crucial for comfort in a full-size sedan. Power steering and power brakes were standard, making the large vehicle easier to maneuver and control. Safety features included seat belts, a padded dashboard, and side-impact door beams, which were becoming more common in the late 80s. Optional safety features could include cruise control, which aided in reducing driver fatigue on long journeys. Unfortunately, comprehensive crash-test ratings for vehicles of this vintage, especially for specific model years like 1987, are not readily available in the same detailed format as modern vehicles. However, the Diplomat's substantial curb weight and full-frame construction offered a degree of passive safety inherent to larger cars of the time. Driver-assistance features were minimal by today's standards; cruise control was the primary aid. More advanced technologies like anti-lock brakes (ABS) were rare and typically found on luxury models or as very expensive options. Backup lights and a high-mounted brake light were standard safety features. The overall tech package was focused on comfort and basic functionality rather than advanced driver aids or sophisticated infotainment systems, reflecting the automotive landscape of the late 1980s.

What Colors Options are Available?

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In the meantime, feel free to explore the other sections for more content.

1987 Dodge Diplomat Prices and Market Value

When new, the 1987 Dodge Diplomat typically retailed in the range of $10,000 to $15,000, depending on trim level and optional equipment. As with most vehicles from this era, it experienced significant depreciation throughout the 1990s and early 2000s. Today, used market prices for the 1987 Dodge Diplomat vary widely, generally ranging from $2,000 for project cars or those in fair condition, to $5,000-$10,000 for well-preserved examples in excellent condition. Factors heavily influencing resale value include overall condition, mileage, rust presence, original documentation, and whether it has been maintained in its original configuration or modified. Well-maintained, low-mileage examples, especially those in desirable colors or with desirable options, command higher prices among collectors and enthusiasts.

1987 Dodge Diplomat Cost of Ownership

Owning a 1987 Dodge Diplomat is generally considered moderately economical, particularly if purchased at a low used price. Insurance costs are typically low for older vehicles of this type. Fuel costs, however, can be a significant factor due to the V8 engines' thirst, averaging around $150-$250 per month depending on driving habits and fuel prices. Routine maintenance, such as oil changes, filter replacements, and brake jobs, is relatively affordable due to the car's common parts. However, repairs for aging components, especially electrical issues or rust remediation, can become costly. Long-term ownership requires vigilance for rust and electrical gremlins, which can escalate expenses.

1987 Dodge Diplomat Fuel Efficiency

Fuel Type Gasoline
Fuel Capacity -
City Mileage -
Highway Mileage -

1987 Dodge Diplomat Warranty

Basic
Original warranty 0 months / No data
Estimated remaining Expired
Powertrain
Original warranty 0 months / No data
Estimated remaining Expired
Rust
Original warranty 0 months / No data
Estimated remaining Expired

1987 Dodge Diplomat Insurance

Insurance for a 1987 Dodge Diplomat is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.

How Does the 1987 Dodge Diplomat Compare to Other Sedan?

The 1987 Dodge Diplomat competed in the large sedan segment against rivals such as the Ford Crown Victoria/Grand Marquis, Chevrolet Caprice, and various models from import manufacturers like the Toyota Cressida or later models of the Buick LeSabre. In terms of performance, its V8 engines offered decent torque but were not particularly quick compared to some competitors, especially as emissions controls became more stringent. The Ford and Chevrolet offerings often had more robust V8 options that could feel more powerful. Features-wise, the Diplomat offered a comfortable ride and spacious interior, comparable to its domestic rivals. However, some competitors, particularly the Mercury Grand Marquis, often boasted more upscale interiors and a slightly quieter ride. Reliability is a mixed bag. The Diplomat's core V8 powertrain is generally robust, but its susceptibility to rust and electrical gremlins can be a concern compared to some Japanese rivals which often had better corrosion protection. Price-wise, the Diplomat was typically positioned competitively, often being more affordable than its Mercury or Cadillac counterparts. Similar alternatives in terms of size and comfort could include the aforementioned Ford Crown Victoria/Grand Marquis or Chevrolet Caprice. For a slightly more modern feel with potentially better reliability and fuel economy, though with a less plush ride, one might consider a later model Buick LeSabre or even a well-maintained Japanese sedan like a Toyota Avalon or Lexus LS400 if budget allows. However, if the goal is classic American full-size comfort and a V8 soundtrack at an accessible price point, the Diplomat remains a solid contender among its direct peers.

Final Verdict: Is the 1987 Dodge Diplomat a Good Sedan?

The 1987 Dodge Diplomat is ideal for buyers seeking a comfortable, spacious, and affordable full-size sedan with classic American charm and a V8 engine. It's a good choice for those who appreciate its smooth ride and classic styling, and are prepared for the maintenance of an older vehicle. It is worth buying, especially in good to excellent condition, as a practical cruiser or a project car. Buying used is the only option. Focus on examples with minimal rust and well-documented maintenance. The Diplomat S trim offers a slightly more luxurious experience, making it a desirable find. Avoid vehicles with extensive electrical issues or significant rust damage, as repairs can quickly become expensive.

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Simon A

Simon is a contributor to VinCheck, where he provides articles and reviews on various automotive topics. His work focuses on delivering accurate and up-to-date information about used cars, helping readers make informed decisions.