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Triumph Triumph tr 6 vs Triumph Unknown: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Triumph Triumph tr 6
79%
MOT pass rate · 1 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Triumph tr 6 (79%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Triumph Triumph tr 6 Triumph Unknown
MOT pass rate 79% 89% ✓
MOT failure rate 21% 11% ✓
Faults & advisories per test 0.4 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 77,270 mi 16,601 mi
Sample size (vehicles) 1 65,927

Most common faults

Triumph Triumph tr 6

  1. Nearside Rear Drive shaft uj which forms part of the suspension has slight play in a universal joint (2.4.G.4b)
  2. Nearside Rear position lamp(s) excessively deteriorated so that it is not visible from a reasonable distance (1.1.A.3d)
  3. Nearside Stop lamp not working (1.2.1b)
  4. Offside Front Wheel insecure (4.2.A.1c)
  5. OIL LEAK IS FROM ENGINE AREA ???
  6. Oil leak

Triumph Unknown

  1. Exhaust noisy (8.1.1 (a))
  2. Exhaust noisy (7.1.2)
  3. Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
  4. COVID-19 6 MONTH EXTENSION
  5. Rear Tyre worn close to the legal limit (5.2.3 (e))
  6. Steering headbearing has slight free play (2.2.2)

Reliability FAQ

On MOT pass rate the Triumph Triumph tr 6 (79%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Triumph tr 6 report Full Triumph Unknown report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.