Japan · May 1990 Japanese launch specification

Mitsubishi Diamante 25V

A wide-bodied V6 hardtop for Japan’s changing luxury-car market.

Sedans
Front three-quarter exterior · Photo shows Representative first-generation Mitsubishi Diamante 25E-SE at a museum, photographed in 2026; not the profiled 1990 25V. Build year and exact mechanical specification unverified..
Diamante 25V — representative photograph · TTTNIS · CC0 1.0
Auction-based estimated value

Research pending

A matching completed auction sale has not been verified for this exact year, body, trim, engine, transmission and market.

Joyride shows this gap instead of substituting an asking price, unsold bid or mismatched special vehicle.

A place in vehicle history

More than a set of wheels.

The Diamante arrived in May 1990. Mitsubishi links its timing to the 1989 tax reforms, which opened a commercial opportunity for larger cars. This profile follows the Japanese 25V catalogue entry, rather than applying every feature advertised for the wider Diamante range.

Look a little closer.

Diamante and the related Sigma shared the 1990–1991 Car of the Year Japan award.

Photos show an example of the model or generation. The pictured vehicle’s year, equipment, or modifications can differ from the specification described here.

Room for a wider car

Tax rules can influence a car’s size as much as engineering can. Mitsubishi describes the 1989 reforms as an opening for its wide-body 2.5-litre luxury model. That history explains the positioning; it does not establish a particular buyer’s tax bill.

Source: Mitsubishi Motors — historic vehicle archive ↗

A model range is not one specification

Mitsubishi’s retrospective highlights Active Two and traction-control technology. GAZOO’s exact 25V entry leaves several safety-equipment fields blank. A blank is not proof of absence, so those systems are neither promised nor denied for this grade without a period grade brochure.

Source: Toyota Motor Corporation / GAZOO — gazoo-diamante-25v ↗

Where these facts come from

Selected facts checked for this edition. Some source pages link to broader model families. Last reviewed 2026-10-15T23:03:27.717Z.

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