Triumph 1 vs Triumph 1500: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph 1
85%
MOT pass rate · 6 vehicles
Triumph 1500
74%
MOT pass rate · 37,142 vehicles
Verdict: On MOT pass rate the Triumph 1 (85%) and Triumph 1500 (74%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 1 | Triumph 1500 |
|---|---|---|
| MOT pass rate | 85% ✓ | 74% |
| MOT failure rate | 15% ✓ | 26% |
| Faults & advisories per test | 0.8 ✓ | 2.3 |
| Dangerous-fault share | 0% | 0% |
| Average mileage | 29,487 mi | 58,068 mi |
| Sample size (vehicles) | 6 | 37,142 |
Most common faults
Triumph 1
- Exhaust has a major leak of exhaust gases (7.1.2)
- Rear Brake pad(s) close to minimum limit (1.1.13 (a))
- Nearside Front Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Parking brake: efficiency below requirements (3.7.B.7)
- Front Brake pad(s) wearing thin (3.5.1g)
- Offside Front position lamp(s) not working (1.1.A.3b)
Triumph 1500
- Parking brake: efficiency below requirements (3.7.B.7)
- Windscreen washer provides insufficient washer liquid (8.2.3)
- Nearside Rear wheel bearing has slight play (2.6.2)
- Offside Rear wheel bearing has slight play (2.6.2)
- Brakes imbalanced across an axle (3.7.B.5b)
- Oil leak
Reliability FAQ
On MOT pass rate the Triumph 1 (85%) and Triumph 1500 (74%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 1 report Full Triumph 1500 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.