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Triumph Twin vs Triumph Unknown: reliability comparison

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

Triumph Twin
77%
MOT pass rate · 4 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Twin (77%) 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 Twin Triumph Unknown
MOT pass rate 77% 89% ✓
MOT failure rate 23% 11% ✓
Faults & advisories per test 0.2 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 24,006 mi 16,601 mi
Sample size (vehicles) 4 65,927

Most common faults

Triumph Twin

  1. day light use only
  2. Rear wheel bearings have slight free play (2.4.A.2c)
  3. Rear Wheel spoke excessively loose (4.2.1b)
  4. Rear position lamp does not illuminate immediately when it is switched on (1.1.3a)
  5. Rear suspension fouling which affects the movement of the rear suspension (2.4.A.3a)
  6. Stop lamp does not illuminate immediately a brake applies (1.3.1a)

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 Twin (77%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Twin 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.