At a Glance
No model-specific problems have been flagged for the Triumph Tr8 — nothing on this generation occurs significantly more often than the UK average. The data still shows 82 common MOT failure types below. Electrical is the most common MOT failure category. Based on 775 MOT tests from DVSA data.
Problems are patterns in the DVSA data that occur significantly more often on this model than the UK average — confirmed at 99% statistical confidence. Read how we calculate MOT pass rates and problems →
Below: the full MOT-data picture for the Triumph Tr8 — MOT pass rate vs the UK average, common problems vs UK fleet patterns, the most likely MOT failures by frequency, fault occurrence by mileage band, and pass/fail trends. All numbers drawn from DVSA records.
Triumph Tr8 MOT Pass Rate
Across 775 MOT tests from DVSA data, the Triumph Tr8 (1978–1981) has a fail rate of 26.1%.
All-time UK average fail rate: 34.9%
Tell Us About Your Problem
Help other Triumph Tr8 owners — report a problem and we'll add it to the database
Tell Us About Your Problem
Help other Triumph Tr8 owners — report a problem and we'll add it to the database
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Problems by mileage
Common problems, MOT failures and advisories on the Triumph Tr8, grouped by the mileage they typically appear at.
186 distinct problems · 1,227 total occurrences in current filter
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Advisory items are MOT tester observations. Frequency can be influenced by driving style and usage patterns.
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Frequently Asked Questions
What are the most common Triumph Tr8 problems?
Based on DVSA MOT data for the Triumph Tr8 TR8 (1978–1981), we have identified 0 common problems. Electrical is the most common MOT failure category.
How reliable is the Triumph Tr8?
This generation has 775 MOT tests on record with a 26.1% fail rate. A fault is flagged as a "Common Problem" only when it occurs significantly more often on this model than the UK average, confirmed at 99% statistical confidence.
What commonly fails the MOT on a Triumph Tr8?
There are 82 distinct MOT failure types recorded for the TR8 (1978–1981), grouped by the mileage these failures typically occur. See the Common MOT Failures section on this page.
Can I report a problem with my Triumph Tr8?
Yes — use the "Tell Us About Your Problem" form on this page. Your report helps other Triumph Tr8 owners spot problems early. All submissions are reviewed before being added to the public database.
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