Porsche 928 S (1984)
1984 Porsche 928 S
CarHunch analysed 225 real MOT records for the 1984 Porsche 928 S. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 1984 Porsche 928 S has a first-time MOT pass rate of just 60%, well below the UK average of 80%, which reflects the age and complexity of these cars—roughly 15% have experienced dangerous defects at some point. Expect these vehicles to need work: the average car arrives with 2 failures and 7 advisories per test, suggesting systemic wear across multiple systems rather than isolated problems.
At 104,700 miles median, these cars are high-mileage examples, which is unsurprising for a 40-year-old sports car that was built to be driven. Before committing to one, budget for preventive maintenance on cooling, fuel systems, and electrical components—these patterns are typical failure points—and have a pre-purchase inspection by a specialist who knows the 928 well, not a generalist.
What to check before buying a 1984 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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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (100%) | 224 | 60.1% | 2 |
| LPG (0%) | 1 | 81.3% | 3 |
Mileage Distribution
Most 1984 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.
Half of all 1984 Porsche 928 S vehicles fall between 84,596 and 124,891 miles.
1984 Porsche 928 S — Still on the Road
Numbers are declining — 19 vehicles still getting MOTs in 2025 (31% of peak).
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
Found a specific Porsche 928 S?
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