Isdera Imperator 108i Buying Guide

The Imperator 108i was a low-volume German coupe built from 1984 to 1993, and the Wikipedia entry cites a total of 30 units. Confirm the offered Isdera Imperator 108i matches its paperwork, then book an inspection that covers its construction and fitted equipment.

I used the Wikipedia Imperator 108i entry when preparing this November 6, 2026 guide. Its specifications describe the model, not every surviving chassis. So, the checks below turn that background into questions for a seller and a workshop; they do not assign a failure rate or current market value.

Confirm which of the roughly 30 cars this is

The Imperator 108i was a low-volume German coupe built from 1984 to 1993, and the Wikipedia entry cites a total of 30 units. With so few cars, the chassis number and ownership chain carry most of the value story. Ask for the build record, registration history and any Isdera correspondence for this car. Compare the physical identifiers with the papers yourself. A car this rare can attract confusing replicas or parts cars, so let documents lead the inspection.

Check which Mercedes V8 sits behind the seats

The entry lists several Mercedes-derived V8 options, including M117 engines of 5.0 and 5.6 litres and AMG-built units, paired with a five-speed ZF manual. Ask which engine is fitted now and whether it is original to the car. Request service invoices and the name of the shop that maintains it. Mercedes engine parts may be easier to source than Isdera body items, but the installation, cooling and linkage still need a specialist who knows this car.

Look at the gullwing doors and body with care

Ask the seller to open and close each door while you watch, following whatever procedure the owner has been using. Note seal condition, alignment and any struggling supports without leaning on the door. Request photographs of past body repairs and ask a specialist to examine attachment points and the underside. Ask who would make a replacement panel or seal today. A clean paint finish can hide filler, so treat the finish as one data point, not a structural report.

Plan for age, storage and limited use

A car built in the 1980s or early 1990s that spends long periods parked needs a fresh look at tyres, fluids, rubber lines and brakes. Ask for the dates of the last tyre change and brake service. Use a careful start and a short restrained drive only if the car is insured and safe to move. A low odometer on a collector car can mean long storage rather than gentle use, so ask the inspector what storage tends to do to the parts fitted here.

Put the identity and import file beside the inspection

The physical chassis identifier must agree with the sale documents before a report is ordered. Use our VIN identity checks to organise that comparison and our imported-car report guide to understand why foreign history may be thin. Ask for original registration, import and ownership papers as applicable. NMVTIS offers a U.S. title-history route with defined coverage; it does not certify a bespoke build or replace foreign records. A fake PDF can disguise an ownership gap, so verify evidence through the issuing source rather than accepting a seller screenshot.

Agree the specialist work before leaving a deposit

Tell the shop which version and components it will see, then agree lift access, a controlled road test and a written description of limitations. Our pre-purchase inspection checklist helps frame the appointment, while NYC used-car guidance recommends an independent mechanic. Ask the specialist to separate immediate safety work from cosmetic preferences and optional upgrades. Look, a repair estimate is useful only if a supplier will actually provide the required part. Have the shop obtain a response for any known missing item.

Keep the offer conditional on the findings you care about. Put any seller repair promise in the purchase agreement. If the workshop cannot establish structural condition or a route to a needed safety part, defer the deal rather than inventing a discount. The final decision should reflect the documented car and your intended use, not a figure copied from a launch story.

Write down what the viewing showed

Keep a dated note of what you saw on the Isdera Imperator 108i: chassis identifiers, warning lights, fluid leaks under the car, tyre dates, panel gaps and any part the seller could not show. Photograph each item. Send that list to the specialist before the appointment so the inspection starts from facts, not from the advert. If the seller will not allow photographs or lift access, ask why before you go further. A rare car rewards slow, written checks more than a quick decision made because another buyer might appear.

We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. Wholesale reports cost a few dollars; confirm current coverage and the total at checkout. A quiet report can miss unreported repairs. Keep the independent inspection even if the seller sends an impressive PDF.

Sources

• Wikipedia Imperator 108i entry
• U.S. DOJ NMVTIS
• NYC used-car buying guidance