Performance by cohort
2 year bands · 2,033 tests
Pass rate climbs 4.8 points across the cohorts — newer 600lt V8 S A examples clear the test more reliably than the early cars.
Pass
95.2%
Fail
1.4%
PRS
3.0%
Avg mileage at test
10,945 mi
Pass
100.0%
Fail
0.0%
PRS
0.0%
Avg mileage at test
8,349 mi
Cohort = vehicle's first-registration year band. Same model, different generations of build.