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Triumph T20 sh vs Triumph Unknown: reliability comparison

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

Triumph T20 sh
93%
MOT pass rate · 1 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph T20 sh (93%) 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 T20 sh Triumph Unknown
MOT pass rate 93% ✓ 89%
MOT failure rate 7% ✓ 11%
Faults & advisories per test 0.3 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 9,289 mi 16,601 mi
Sample size (vehicles) 1 65,927

Most common faults

Triumph T20 sh

  1. Front Steering movement slightly 'notchy' (2.2.1b)
  2. Steering headbearing has slight free play (2.2.2)
  3. Nearside Front shock absorber has light misting of stanchion (2.3.3)
  4. Offside Front shock absorber has light misting of stanchion (2.3.3)
  5. Drive chain excessively loose (6.2.1d)
  6. Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)

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 T20 sh (93%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph T20 sh 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.