Diesel Alfa Romeo 147: MOT pass rate
58% of diesel Alfa Romeo 147s pass the MOT first time, measured across 626 DVSA tests on that fuel type alone. Average mileage at test was 114,160.
Diesel against the other Alfa Romeo 147 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 64.6% | 1,211 |
| Diesel | 58% | 626 |
| All Alfa Romeo 147 | 62.4% | 1,838 |
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 147 specifically, petrol is the strongest at 64.6%, and this diesel version sits 4.4 points below the 62.4% model average.
What it means if you are buying one
The diesel Alfa Romeo 147 fails more often than the model average, so budget for the items that catch this fuel type and treat a fresh MOT as worth paying for. 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 147 had covered 114,160 miles at test, against 87,565 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 147 page separate age from fuel if you want to isolate one.
Other Alfa Romeo 147 fuel types
- Petrol Alfa Romeo 147 - 64.6%