Diesel Alfa Romeo Giulietta: MOT pass rate
68.4% of diesel Alfa Romeo Giuliettas pass the MOT first time, measured across 12,639 DVSA tests on that fuel type alone. Average mileage at test was 99,140.
Diesel against the other Alfa Romeo Giulietta versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 76.4% | 12,807 |
| Diesel | 68.4% | 12,639 |
| All Alfa Romeo Giulietta | 72.4% | 25,447 |
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 Giulietta specifically, petrol is the strongest at 76.4%, and this diesel version sits 4 points below the 72.4% model average.
What it means if you are buying one
The diesel Alfa Romeo Giulietta 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 Giulietta had covered 99,140 miles at test, against 71,937 for the petrol. That is above average and into the range where cambelts and water pumps are due if they have not already been done, so ask for the service history rather than take the mileage on trust.
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 Giulietta page separate age from fuel if you want to isolate one.
Other Alfa Romeo Giulietta fuel types
- Petrol Alfa Romeo Giulietta - 76.4%