Alfa romeo 147 vs Alfa romeo 155: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Alfa romeo 147
69%
MOT pass rate · 31,412 vehicles
More reliable
Alfa romeo 155
62%
MOT pass rate · 2,443 vehicles
Verdict: On MOT pass rate, the Alfa romeo 147 is the more reliable of the two — 69% pass first time versus 62%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Alfa romeo 147 | Alfa romeo 155 |
|---|---|---|
| MOT pass rate | 69% ✓ | 62% |
| MOT failure rate | 31% ✓ | 38% |
| Faults & advisories per test | 2.2 ✓ | 3.0 |
| Dangerous-fault share | 1% | 0% ✓ |
| Average mileage | 102,577 mi | 112,005 mi |
| Sample size (vehicles) | 31,412 | 2,443 |
Most common faults
Alfa romeo 147
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Rear Exhaust has part of the system slightly deteriorated (7.1.1a)
- Oil leak
Alfa romeo 155
- Parking brake: efficiency below requirements (3.7.B.7)
- Exhaust emissions carbon monoxide content after 2nd fast idle excessive (7.3.D.3)
- Service brake: efficiency below requirements (3.7.B.7)
- Exhaust emissions Lambda reading after 2nd fast idle outside specified limits (7.3.D.3)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
Reliability FAQ
On MOT pass rate, the Alfa romeo 147 is the more reliable of the two — 69% pass first time versus 62%. It's one signal among several; check the full breakdown below.
Full Alfa romeo 147 report Full Alfa romeo 155 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.