AVOIR

1989 Porsche 928 S4

Ownership intelligence · Minicompact Cars · Premium Gasoline
63
Average
High Risk
AVOIR Score out of 100
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Category Scores

Longevity 78
Maintenance 59
Depreciation 69
Performance 71
Efficiency 27

Reliability & Ownership FAQ

How long will a 1989 Porsche 928 S4 last?

AVOIR scores the 1989 Porsche 928 S4's longevity 78/100 (good), estimated from high-mileage survival data and resale-panel evidence of how far these vehicles actually run.

What does it cost to own a 1989 Porsche 928 S4?

AVOIR scores the 1989 Porsche 928 S4 on maintenance 59/100 and depreciation 69/100 — higher is better (lower real cost) — plus fuel, insurance and resale in the full breakdown above.

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AVOIR scores every vehicle across 7 ownership factors using EPA fuel-economy data, NHTSA safety & complaints, IIHS ratings, and a proprietary used-market resale panel.