Performance by cohort
3 year bands · 2,305 tests
Pass rate climbs 4.5 points across the cohorts — newer Roller Team examples clear the test more reliably than the early cars.
Pass
85.4%
Fail
8.2%
PRS
5.4%
Avg mileage at test
33,817 mi
Pass
89.8%
Fail
5.8%
PRS
3.4%
Avg mileage at test
21,515 mi
Pass
89.9%
Fail
1.7%
PRS
8.2%
Avg mileage at test
17,805 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.