Porsche 928 Classic (1977-1995) reliability
Porsche 928 Classic built before 2000: about average at the MOT
Porsche 928 Classic models built before 2000 fail their MOT about as often as similar cars the same age. An independent inspection matters more than the wider numbers on cars this old.
Looking at a Porsche 928 Classic?
Enter its number plate to see its full MOT history, risk rating and running costs.
Key figure
17% of MOT tests on Porsche 928 Classic models built before 2000 ended in a fail (retests included), against 19% for similar cars the same age.
Most common issue
The most common MOT issue on Porsche 928 Classic models built before 2000 involves fluid leaks.
Based on 747 tests of 928 models registered 1977-1995.
About 1 in 12 928 Classic MOTs (8.6%) failed and still hadn't passed 3 days later. That's for cars built before 2000 (over 25 years old), all fuels combined.
Based on 747 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 6.8% and 10.8%. A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.
About 1 in 40 928 Classic MOTs (2.3%) found at least one dangerous defect. These are cars built before 2000 (over 25 years old).
Based on 747 tests (DVSA MOT results, 2025), a small sample, so the figure is likely between 1.4% and 3.6%. Dangerous is the most serious grade an MOT gives: a direct risk to road safety.
Classic fail rate by age
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 25+ years old.
How the 928 Classic compares
At each age below, see how the 928 Classic holds up against other cars the same age. The averages combine all fuel types.
Based on 18,498 tests across 6 Porsche models, built before 2000 (over 25 years old).
Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.
What to check before viewing
The model's most common MOT issues, turned into things you can ask about or look for.
Leaks
Worth checkingInspect the leaks carefully and ask the seller for repair history.
Tyres
Worth checkingCheck tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.
Suspension bushes and joints
Worth checkingListen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.
Axles & Wheels
Worth checkingInspect the axles & wheels carefully and ask the seller for repair history.
Vehicle-specific check
Worth checkingCheck the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.
Other coupes to compare
Other coupes, with each one's figures taken at the same age as the 928 Classic.
- 1
Jaguar E-Type
Same body type, tested at the same age
- Fail rate
- 8.8%
- Fail, no pass in 3 days
- 4.1%
- Dangerous
- 1.8%
Lower fail rate: 8.8%, against 16.7% for the Porsche 928 Classic, both built before 2000.
1,235 MOT tests on cars built before 2000
- 2
MG B GT
Same body type, tested at the same age
- Fail rate
- 15.4%
No clear edge over the Porsche 928 Classic on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
1,331 MOT tests on cars built before 2000
- 3
Jaguar XK
Same body type, tested at the same age
- Fail rate
- 23.1%
No clear edge over the Porsche 928 Classic on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
3,434 MOT tests on cars built before 2000
- 4
Mercedes-Benz CLK
Same body type, tested at the same age
- Fail rate
- 24.8%
No clear edge over the Porsche 928 Classic on these figures.
Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.
1,725 MOT tests on cars built before 2000
- Fail rate
- = the share of MOT tests that ended in a fail. Retests count as tests.
- Fail, no pass in 3 days
- = the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
- Dangerous
- = the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
Recall context
DVSA's recall list has no recalls filed under the Porsche 928 name. For the exact car, check with the maker or GOV.UK's recall checker.
What has gone wrong on 928 Classic cars built before 2000
The share of petrol cars that have ever failed an MOT on each part of the car. Based on 53 cars.
Rust, which the MOT calls corrosion: 25% of these cars show rust-related issues at this age.
Check the sills, subframe and brake pipes before you decide.
Classic variants compared
928 Classic variants built before 2000
The fail rate for each 928 Classic variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.
Petrol
- 928 S17.6%528 tests
- 92814.6%206 tests
Most common issues on Porsche 928 models of this age
This list covers every Porsche 928 built before 2000, whichever generation it is. We don't have a defect list for the Classic on its own.
Most common advisories and fails
In order of the share of MOT tests that recorded each one
- 115.9%Advisory
Oil leak, but not excessive
- 25.1%Advisory
Wheel bearing has slight play
- 34.9%Advisory
Suspension arm pin or bush worn, but not moving too much
- 43.9%Advisory
Tyre slightly damaged, cracking or perishing
- 53.9%Advisory
Coil spring corroded
Based on 749 tests
Looking at a Porsche 928 Classic?
Enter its number plate to see its full MOT history, risk rating and running costs.
Frequently asked questions
Built before 2000 (over 25 years old), the Porsche 928 Classic (1977-1995) fails MOTs noticeably less often than typical for this age. This is based on 747 25+ year old MOT tests from DVSA data. Each retest counts as a test.