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Triumph T100t vs Triumph Unknown: reliability comparison

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

Triumph T100t
91%
MOT pass rate · 39 vehicles
More reliable
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate, the Triumph T100t is the more reliable of the two — 91% pass first time versus 89%. It's one signal among several; check the full breakdown below.

Head to head

Measure Triumph T100t Triumph Unknown
MOT pass rate 91% ✓ 89%
MOT failure rate 9% ✓ 11%
Faults & advisories per test 0.3 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 15,863 mi 16,601 mi
Sample size (vehicles) 39 65,927

Most common faults

Triumph T100t

  1. Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
  2. Steering headbearing has slight free play (2.2.2)
  3. Rear Tyre worn close to the legal limit (4.1.3(ii))
  4. Headlamp aim too low (1.6)
  5. Rear suspension bush has slight free play (2.4.A2a(i))
  6. Offside Rear shock absorber has a light misting (2.4.A.1c)

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 T100t is the more reliable of the two — 91% pass first time versus 89%. It's one signal among several; check the full breakdown below.

Full Triumph T100t 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.