Ajs Tempest Roadster: MOT pass rate by registration year

Which Tempest Roadster years pass first time, and which fall short of the model's 72.2% average, from 558 DVSA tests.

2018

highest-passing year · 74.1%

2019

lowest-passing year · 68.6%

5.5pp

spread across 3 years

Pass rate by registration year

first-time pass rate · cohorts with 50 or more tests · registration year from first use date

Highest pass rate: 2018 (74.1% of 197 tests). Lowest: 2019 (68.6% of 172). Years more than two points below the model average: 2019.

Registered	Tests	First-time pass	vs model (72.2%)
2018	197	74.1%	+1.9 pp
2019	172	68.6%	-3.6 pp
2020	84	72.6%	+0.4 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

first-time pass rate by test year · 2021–2025

Questions

Which Tempest Roadster years have the lowest MOT pass rate?: 2019 registered examples pass first time less often than the Ajs Tempest Roadster overall (72.2%); the 2019 cohort is lowest at 68.6% from 172 tests.
Which Tempest Roadster year has the highest MOT pass rate?: 2018, at 74.1% of 197 first tests (2005–2025).
How much does the Tempest Roadster pass rate vary by year?: 5.5 percentage points between the highest (2018, 74.1%) and lowest (2019, 68.6%) 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: Ajs Tempest Roadster reliability, failures and mileage · ranked #4568 of 5428 models· other Ajs models: Modena, Modena 125, DD, Firefox, DD 125 E 08, 16MS