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Triumph 2500 mk2 vs Triumph Unknown: reliability comparison

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

Triumph 2500 mk2
78%
MOT pass rate · 8 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph 2500 mk2 (78%) 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 2500 mk2 Triumph Unknown
MOT pass rate 78% 89% ✓
MOT failure rate 22% 11% ✓
Faults & advisories per test 2.0 0.6 ✓
Dangerous-fault share 0% ✓ 2%
Average mileage 61,172 mi 16,601 mi
Sample size (vehicles) 8 65,927

Most common faults

Triumph 2500 mk2

  1. Parking brake: efficiency below requirements (3.7.B.7)
  2. Oil leak, but not excessive (8.4.1 (a) (i))
  3. Nearside Play in steering rack inner joint(s)
  4. Nearside Inner Front Vehicle structure has slight corrosion (6.1.B.2)
  5. Offside Inner Front Vehicle structure has slight corrosion (6.1.B.2)
  6. Offside Front Vehicle structure has excessive corrosion which adversely affects braking or steering (6.1.A.1)

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 2500 mk2 (78%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph 2500 mk2 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.