Porsche 911 vs Porsche 997 gtr rs: 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 997 gtr rs
100%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche 997 gtr rs (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Porsche 911 | Porsche 997 gtr rs |
|---|---|---|
| MOT pass rate | 85% | 100% ✓ |
| MOT failure rate | 15% | 0% ✓ |
| Faults & advisories per test | 1.1 | 0.0 ✓ |
| Dangerous-fault share | 1% | — ✓ |
| Average mileage | 70,982 mi | 6,695 mi |
| Sample size (vehicles) | 74,656 | 1 |
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 997 gtr rs
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Porsche 911 (85%) and Porsche 997 gtr rs (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Porsche 911 report Full Porsche 997 gtr rs 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.