Which is more reliable, Cadillac or Porsche?
Porsche leads on our inspections: 69/100 average condition vs 54/100 for Cadillac, from 195 real pre-purchase inspections.
Porsche leads on our inspections: 69/100 average condition vs 54/100 for Cadillac, from 195 real pre-purchase inspections. The average car we check scores 61/100.
Head to head
| Cadillac | Porsche | |
|---|---|---|
| Cars inspected | 66 | 129 |
| Average condition | 54/100 | 69/100 |
| In good shape (60+/100) | 36% | 72% |
| Holds up to (avg dips below decent) | ~75k mi | ~98k mi |
| Repainted or replaced panel | 70% | 77% |
| Structural repair found | 5% | 4% |
| Fault codes recently cleared | 23% | 20% |
Green = the better number of the pair. Condition reflects the mix of cars that came to us — age, price, model — so treat small gaps as a tie.
How they score
How long do they stay good?
Good cars by mileage
▬ Cadillac▬ Porsche▬ all cars
Good cars by age
▬ Cadillac▬ Porsche▬ all cars
Share in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; a band under 20 cars follows the nearby bands, so a run above the all-cars line stays above it, and a band of 20 or more uses the rate we measured; where a band has too few cars, the line follows the trend between the bands on either side; rolled-back odometers excluded from the mileage curve). Dashed grey = all cars we check.
Most common faults
Fuel trim out of range · Engine
56%
Oil leaks · Engine
53%
Active error codes · Electronic equipment
42%
Tires condition & wear · Brakes and tires
35%
Dirty or low engine oil · Engine
23%
Oil leaks · Engine
50%
Tires condition & wear · Brakes and tires
36%
Low coolant / cooling system issues · Engine
30%
Worn brake rotors · Brakes and tires
27%
Active error codes · Electronic equipment
24%
FAQ
?
?
What are the most common problems with used Cadillacs and Porsche vehicles?
On Cadillacs we flag fuel trim out of range (56%), oil leaks (53%), active error codes (42%). On Porsche vehicles: oil leaks (50%), tires condition & wear (36%), low coolant / cooling system issues (30%).
?
How many Cadillac and Porsche vehicles have you inspected?
66 Cadillacs and 129 Porsche vehicles — 195 real pre-purchase inspections. Updated Oct 27, 2026.
?
How long do Cadillacs and Porsche vehicles stay in good shape?
In our data, the average Cadillac dips below “decent” around ~75k mi; Porsche around ~98k mi. Individual cars vary — get the one you’re buying inspected.
Buying a used Cadillac or Porsche? Get a pre-purchase inspection before you pay.
Book an inspection
Based on 195 inspections · updated Oct 27, 2026
