Diesel Alfa Romeo 156: MOT pass rate
66.2% of diesel Alfa Romeo 156s pass the MOT first time, measured across 213 DVSA tests on that fuel type alone. Average mileage at test was 131,994.
Diesel against the other Alfa Romeo 156 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 66.9% | 991 |
| Diesel | 66.2% | 213 |
| All Alfa Romeo 156 | 66.7% | 1,206 |
Why the fuel type changes the number
Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.
On the Alfa Romeo 156 specifically, petrol is the strongest at 66.9%, and this diesel version sits 0.5 points below the 66.7% model average.
What it means if you are buying one
There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel Alfa Romeo 156 had covered 131,994 miles at test, against 96,846 for the petrol. That is high mileage, so timing belts, clutches, suspension bushes and corrosion are the items worth budgeting for rather than the MOT itself.
Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Alfa Romeo 156 page separate age from fuel if you want to isolate one.
Other Alfa Romeo 156 fuel types
- Petrol Alfa Romeo 156 - 66.9%