Data as of: DVSA MOT results to 2025
Triumph T21: MOT pass rate by registration year
Which T21 years pass first time, and which fall short of the model's 92.5% average, from 612 DVSA tests.
Pass rate by registration year
Highest pass rate: 1961 (94.7% of 94 tests). Lowest: 1959 (86.0% of 50). Years more than two points below the model average: 1959.
| Registered | Tests | First-time pass | vs model (92.5%) |
|---|---|---|---|
| 1958 | 97 | 90.7% | -1.8 pp |
| 1959 | 50 | 86.0% | -6.5 pp |
| 1960 | 86 | 93.0% | +0.5 pp |
| 1961 | 94 | 94.7% | +2.2 pp |
| 1962 | 89 | 94.4% | +1.9 pp |
Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years. A first-time MOT pass is a roadworthiness check, not a full mechanical inspection.
Pass rate over time
Questions
- Which T21 years have the lowest MOT pass rate?
- 1959 registered examples pass first time less often than the Triumph T21 overall (92.5%); the 1959 cohort is lowest at 86.0% from 50 tests.
- Which T21 year has the highest MOT pass rate?
- 1961, at 94.7% of 94 first tests (2005–2025).
- How much does the T21 pass rate vary by year?
- 8.7 percentage points between the highest (1961, 94.7%) and lowest (1959, 86.0%) cohorts with at least 50 tests. Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.
Full report: Triumph T21 reliability, failures and mileage · ranked #384 of 5428 models· other Triumph models: Bonneville, Tiger, Sprint, Daytona, Speed Triple, Thunderbird