Triumph Bonneville vs Triumph Thunderbird: MOT reliability compared
Updated 05 September 2026.
9.8%
Triumph Bonneville MOT failure rate, 0.9 pts lower than Triumph Thunderbird
Triumph Bonneville is the more reliable MOT performer: 9.8% of Triumph Bonneville MOTs fail versus 10.7% for Triumph Thunderbird, a 0.9 point gap.
| Metric | Triumph Bonneville | Triumph Thunderbird |
|---|---|---|
| MOT failure rate | 9.8% | 10.7% |
| Tests analysed | 305,248 | 81,236 |
| Most common failure | Brakes (19.7%) | Brakes (21.2%) |
Questions and answers
Which is more reliable, Triumph Bonneville or Triumph Thunderbird?
Triumph Bonneville is the more reliable MOT performer: 9.8% of Triumph Bonneville MOTs fail versus 10.7% for Triumph Thunderbird, a 0.9 point gap.
What is the MOT failure rate of the Triumph Bonneville?
9.8% of Triumph Bonneville MOT tests result in a failure, from 305,248 tests.
What is the MOT failure rate of the Triumph Thunderbird?
10.7% of Triumph Thunderbird MOT tests result in a failure, from 81,236 tests.