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Triumph Doretti vs Triumph Unknown: reliability comparison

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

Triumph Doretti
92%
MOT pass rate · 1 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Doretti (92%) 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 Doretti Triumph Unknown
MOT pass rate 92% ✓ 89%
MOT failure rate 8% ✓ 11%
Faults & advisories per test 0.5 ✓ 0.6
Dangerous-fault share 0% ✓ 2%
Average mileage 11,120 mi 16,601 mi
Sample size (vehicles) 1 65,927

Most common faults

Triumph Doretti

  1. Parking brake: efficiency below requirements (3.7.B.7)
  2. Front passenger door does not latch securely closed (6.2.B.1a)
  3. Nearside rear brake recording little or no effort (3.7.B.5a)
  4. Nearside rear parking brake recording little or no effort (3.7.B.6a)
  5. Offside Front Axle king pin has slight play in pin and/or bush (2.5.A.3a)
  6. Offside Front Suspension arm rubber bush deteriorated but not resulting in excessive movement (2.4.G.2)

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 Doretti (92%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Doretti 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.