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Triumph 1500 vs Triumph Tbird: reliability comparison

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

Triumph 1500
74%
MOT pass rate · 37,142 vehicles
Triumph Tbird
73%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Triumph 1500 (74%) and Triumph Tbird (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Triumph 1500 Triumph Tbird
MOT pass rate 74% ✓ 73%
MOT failure rate 26% ✓ 27%
Faults & advisories per test 2.3 0.7 ✓
Dangerous-fault share 0% ✓ 4%
Average mileage 58,068 mi 36,353 mi
Sample size (vehicles) 37,142 2

Most common faults

Triumph 1500

  1. Parking brake: efficiency below requirements (3.7.B.7)
  2. Windscreen washer provides insufficient washer liquid (8.2.3)
  3. Nearside Rear wheel bearing has slight play (2.6.2)
  4. Offside Rear wheel bearing has slight play (2.6.2)
  5. Brakes imbalanced across an axle (3.7.B.5b)
  6. Oil leak

Triumph Tbird

  1. Rear Tyre worn close to the legal limit (5.2.3 (e))
  2. Exhaust noisy (8.1.1 (a))
  3. Front Tyre worn close to the legal limit (5.2.3 (e))
  4. Rear Brake disc(s) slightly worn (3.2.A1l)
  5. Front Wheel has a slightly distorted bead rim. (4.2.2)
  6. Headlamp aim too low (4.1.2 (a))

Reliability FAQ

On MOT pass rate the Triumph 1500 (74%) and Triumph Tbird (73%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Triumph 1500 report Full Triumph Tbird 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.