Porsche 911 vs Porsche 911 carrera gts: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Porsche 911
85%
MOT pass rate · 74,656 vehicles
Porsche 911 carrera gts
96%
MOT pass rate · 424 vehicles
More reliable
Verdict: On MOT pass rate, the Porsche 911 carrera gts is the more reliable of the two — 96% pass first time versus 85%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Porsche 911 | Porsche 911 carrera gts |
|---|---|---|
| MOT pass rate | 85% | 96% ✓ |
| MOT failure rate | 15% | 4% ✓ |
| Faults & advisories per test | 1.1 | 0.4 ✓ |
| Dangerous-fault share | 1% ✓ | 4% |
| Average mileage | 70,982 mi | 15,787 mi |
| Sample size (vehicles) | 74,656 | 424 |
Most common faults
Porsche 911
- 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)
- Under-trays fitted obscuring some underside components
- 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)
- Oil leak, but not excessive (8.4.1 (a) (i))
Porsche 911 carrera gts
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Offside Front Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Rear Nail in tyre
Reliability FAQ
On MOT pass rate, the Porsche 911 carrera gts is the more reliable of the two — 96% pass first time versus 85%. It's one signal among several; check the full breakdown below.
Full Porsche 911 report Full Porsche 911 carrera gts 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.