Triumph Speed vs Triumph Thunderbird: MOT reliability compared
Updated 05 September 2026.
10.7%
Triumph Thunderbird MOT failure rate, 1.7 pts lower than Triumph Speed
Triumph Thunderbird is the more reliable MOT performer: 10.7% of Triumph Thunderbird MOTs fail versus 12.4% for Triumph Speed, a 1.7 point gap.
| Metric | Triumph Speed | Triumph Thunderbird |
|---|---|---|
| MOT failure rate | 12.4% | 10.7% |
| Tests analysed | 169,414 | 81,236 |
| Most common failure | Lamps & electrical (20.6%) | Brakes (21.2%) |
Questions and answers
Which is more reliable, Triumph Speed or Triumph Thunderbird?
Triumph Thunderbird is the more reliable MOT performer: 10.7% of Triumph Thunderbird MOTs fail versus 12.4% for Triumph Speed, a 1.7 point gap.
What is the MOT failure rate of the Triumph Speed?
12.4% of Triumph Speed MOT tests result in a failure, from 169,414 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.