Porsche 928 S (1985)

193 real MOT outcomes analysed • 58.5% first-time pass rate

1985 Porsche 928 S

CarHunch analysed 193 real MOT records for the 1985 Porsche 928 S. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.

Below average reliability 21.5% below UK average
58.5%
pass MOT first time
UK average: ~80%
102,449
typical mileage
79,667–132,610 middle half
18.7%
ever had a dangerous defect
recorded at any MOT
1.95
avg MOT failures per car
over 7.8 tests on record

What to check before buying a 1985 Porsche 928 S

Practical pre-purchase checks for this age and model.

  • 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
  • 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
  • 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
  • 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.

Before you buy a Porsche 928 S

MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.

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Mileage Distribution

Most 1985 Porsche 928 S vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.

79,667
low mileage
102,449
typical
132,610
high mileage

Half of all 1985 Porsche 928 S vehicles fall between 79,667 and 132,610 miles.

1985 Porsche 928 S — Still on the Road

29 vehicles still getting MOTs in 2025 — 53% of the peak remain.

55 29 2014 2025

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.

MOT History Averages

7.8
Avg MOT tests per vehicle
1.95
Avg failures per vehicle
8.8
Avg advisories per vehicle

Found a specific Porsche 928 S?

Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.

UK

Other model years — Porsche 928 S:

1980 1981 1982 1983 1984 1986 1987 1988 1989 1990 1991