Porsche 911 vs Porsche Cayenne gts v8 tiptronic s a: 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 Cayenne gts v8 tiptronic s a
92%
MOT pass rate · 94 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche Cayenne gts v8 tiptronic s a (92%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche 911 | Porsche Cayenne gts v8 tiptronic s a |
|---|---|---|
| MOT pass rate | 85% | 92% ✓ |
| MOT failure rate | 15% | 8% ✓ |
| Faults & advisories per test | 1.1 | 0.9 ✓ |
| Dangerous-fault share | 1% ✓ | 5% |
| Average mileage | 70,982 mi | 94,840 mi |
| Sample size (vehicles) | 74,656 | 94 |
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 Cayenne gts v8 tiptronic s a
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Rear Brake pad(s) wearing thin (3.5.1g)
- 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))
- Rear Registration plate deteriorated but not likely to be misread Rear number plate delaminating (0.1 (b))
Reliability FAQ
On MOT pass rate the Porsche 911 (85%) and Porsche Cayenne gts v8 tiptronic s a (92%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche 911 report Full Porsche Cayenne gts v8 tiptronic s a 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.