Triumph Unknown vs Triumph Vitesse convertable: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Triumph Vitesse convertable
77%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Triumph Unknown (89%) and Triumph Vitesse convertable (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph Unknown | Triumph Vitesse convertable |
|---|---|---|
| MOT pass rate | 89% ✓ | 77% |
| MOT failure rate | 11% ✓ | 23% |
| Faults & advisories per test | 0.6 ✓ | 1.1 |
| Dangerous-fault share | 2% | 0% ✓ |
| Average mileage | 16,601 mi | 61,057 mi |
| Sample size (vehicles) | 65,927 | 2 |
Most common faults
Triumph Unknown
- Exhaust noisy (8.1.1 (a))
- Exhaust noisy (7.1.2)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
- COVID-19 6 MONTH EXTENSION
- Rear Tyre worn close to the legal limit (5.2.3 (e))
- Steering headbearing has slight free play (2.2.2)
Triumph Vitesse convertable
- Front Brake pad(s) wearing thin (3.5.1g)
- Oil leak
- Steering system lightly rubbing column on exhaust manifold (2.2.D.2a)
- oil leak
- os indicator switch operation
- Oil leak
Reliability FAQ
On MOT pass rate the Triumph Unknown (89%) and Triumph Vitesse convertable (77%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph Unknown report Full Triumph Vitesse convertable 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.