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1998 Mitsubishi Diamante

  • 1998 Mitsubishi Diamante ES Sedan

    ES Sedan

    • MAX MPG
    • SEATS
    • ENGINE
      3.5L V6
    • MSRP
  • 1998 Mitsubishi Diamante LS Sedan

    LS Sedan

    • MAX MPG
    • SEATS
    • ENGINE
      3.5L V6
    • MSRP
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1998 Mitsubishi Diamante Review

Fails to compete in a crowded market.

Reviewed by Automotive on


The 1998 Mitsubishi Diamante is a sedan that was introduced in 1990. It was unveiled at the Tokyo Motor Show in 1989 and went on sale the following year in Japan. The car was subsequently imported to the North American Market. The Diamante played a major role in changing the image of Mitsubishi. Before this car, Mitsubishi was not known as an ideal manufacturer of luxury cars. The launch of the Honda Legend triggered Mitsubishi into making a luxury car that could compete with it, and the Diamante was the end result.

The Range

Body Styles: sedan
Engines: 3.5-liter V-6
Transmissions: four-speed automatic
Models: Mitsubishi Diamante ES, Mitsubishi Diamante LS

What's New

The 1998 Mitsubishi Diamante has a remote keyless entry and anti-lock brakes as standard features for all its models. The LS model in particular got a power moonroof as well as a Homelink remote-controlled transmitter for opening garage doors.


The 1998 Mitsubishi Diamante is larger than its previous generation, which was considered to be dull-looking despite the fact that it was loaded inside with high-tech gadgets. The current model now features distinctive design cues that can be traced back to the best luxury cars from Europe. The Diamante has a chiseled exterior styling similar to a BMW, which is bolder than the previous generation’s smooth and flowing design. The window moldings get a chrome touch as do the license plate surround, alloy wheels, and grille trim. From the rear, the 1998 Mitsubishi Diamante could almost be mistaken for an older BMW 7-Series sedan.


The 1998 Mitsubishi Diamante's longer length as compared to the previous generation does translate to more space inside, but the difference is relatively small as compared to the difference in length. The front seats offer the same space and room as it did before, but the rear bench has become roomier than ever. The 1998 Mitsubishi Diamante offers enough legroom and foot room for four adults to sit comfortably, although tall occupants may find themselves without enough headroom with the power sunroof installed. Storage space in the car is below the average as well, and the retractable cup holders feel a little too flimsy. The dashboard layout has been simplified from the previous generation, but some controls are too small. Overall, the dashboard lacks a certain layout, and it feels like most buttons are just attached wherever there was space. On a positive note, visibility is quite good thanks to the low dashboard top. The trunk does offer lots of space, but the hinges for the trunk lid dip into the cargo area.

Performance & Handling

The 1998 Mitsubishi Diamante is available with just one engine, which is a 3.5-liter V-6 engine that delivers 210 horsepower and 231 lb-ft of torque. The engine is one of the biggest and most heavy-on-torque engines used in luxury sedans, which is why it comes as no surprise to see that it delivers lots of lively acceleration. The Diamante goes from standstill to 60 mph within 8.1 seconds, which is quite an impressive figure for a luxury sedan. The engine delivers quite a kick off the line when the throttle is floored, and the same applies in passing situations as well. The wind and noise level is quite low, but the engine is a little too rugged for that of a luxury car.


The 1998 Mitsubishi Diamante has no information available on crash tests.

EPA Fuel Economy

Mitsubishi Diamante: 18/24 mpg city/highway

You'll Like

  • Powerful acceleration
  • Good styling
  • Lots of interior space

You Won't Like

  • Poor dashboard layout

Sum Up

Fails to compete in a crowded market.

If You Like This Vehicle

  • Nissan Maxima
  • Honda Legend
  • Audi A4
  • BMW 328

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