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Triumph Thunderbird 1600 abs vs Triumph Unknown: reliability comparison

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

Triumph Thunderbird 1600 abs
89%
MOT pass rate · 2 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph Thunderbird 1600 abs (89%) 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 Thunderbird 1600 abs Triumph Unknown
MOT pass rate 89% 89%
MOT failure rate 11% 11%
Faults & advisories per test 0.6 0.6
Dangerous-fault share 9% 2% ✓
Average mileage 21,025 mi 16,601 mi
Sample size (vehicles) 2 65,927

Most common faults

Triumph Thunderbird 1600 abs

  1. Rear Tyre worn close to the legal limit out of shape (5.2.3 (e))
  2. Rear Brake disc(s) excessively scored (3.2.A1l)
  3. Rear Brake disc(s) has excessive run out (3.2.A1m)
  4. Rear Brake pad(s) (sintered type) less than 1.0mm thick (3.2A1f(ii))
  5. Rear Roller brake test indicates excessive fluctuation of brake effort (3.3.A1d)
  6. Rear Tyre worn close to the legal limit (4.1.3(ii))

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 Thunderbird 1600 abs (89%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph Thunderbird 1600 abs 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.