Porsche 928 S (1992)

Estimated running costs and MOT pass rates from 58 MOT tests in 2024.

Annual Cost

£2,888

£241/month

MOT Pass Rate

72%

Average

Road Tax

£375

Estimated/year

Est. Insurance

Grp 35-50

4957cc Petrol

Check Carefully

72% pass rate, £2,888/year to run. 10 points below average.

Buying this car? Check for finance, write-offs & theft

£4.99

Check a specific Porsche 928 S

Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.

Petrol4957cc34 years old58 tests119k miles avg

Annual Running Costs

Fuel (Petrol, 4957cc)

~30 mpg

£1,958

Road Tax

Pre-2001 engine size rate

£375

MOT Test

£55

Predicted Repairs

Higher estimate due to low pass rate

£500

Total per year£2,888

Per month£241/mo

Per week£56/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.

Reliability Verdict

72% MOT pass rate(Average)

0%All-model avg: 82%100%

Average reliability. Expect some repairs as it ages. That's 10 points below the average of 82% across all models in our data. It falls below the Porsche brand average of 92%.

72% of MOT tests on Porsche 928 Ss from 1992 ended in a pass in 2024, when they were about 32 years old. That's based on 58 tests across the UK, retests included. The average mileage recorded at those tests was 118,583 miles.

Got a Porsche 928 S you're looking at?

Enter the reg plate to check its specific MOT history, mileage, and health score.

How Does It Compare?

Rank among 1992 models130th of 172(bottom 25%)

Rank among Porsche models269th of 272(bottom 2%)

vs average of all models-10%(82% avg)

vs 1992 models average-5%(77% avg)

vs Porsche average-20%(92% avg)

Mileage Analysis

118,583

Average miles

236,800

Expected for age

The average 1992 Porsche 928 S had 118,583 miles on the clock at its 2024 MOT, which is below the expected 236,800 miles for a 32-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Looking at a specific Porsche 928 S?

Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.

Best Year to Buy?

Of the years with at least 100 tests, the 1990 model has the highest MOT pass rate at 84%, while the 1991 model has the lowest at 81%. The 1992 scores 72%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Porsche 928 S by Year

Year	Pass Rate	Tests	Avg Mileage
1992	72%	58	118,583 mi
1991	81%	181	114,141 mi
1990	84%	125	115,960 mi

Similar Cars to Consider

Mercedes SL

1994 · 4973cc Petrol

£2,738/year

88%

+16%

Jaguar XJS

1990 · 5343cc Petrol

£2,738/year

82%

+10%

TVR Chimaera

1994 · 4988cc Petrol

£2,738/year

83%

+11%

Mercedes 500

1991 · 4973cc Petrol

£2,738/year

87%

+15%

Check a Specific Porsche 928 S

Enter a reg plate to get the full MOT history, health score, and mileage verification.

Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.

About the 1992 Porsche 928 S

The 1992 Porsche 928 S is a luxury car. Our records list a 4957cc petrol engine, though engines vary between versions. 58 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 25% of 1992 models for MOT pass rate.

With an average of 118,583 miles recorded at its 2024 MOT tests, Porsche 928 S owners tend to use this car less than the typical driver.

1992 Porsche 928 S Fuel Costs

The 4957cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,958 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year).

What does it cost to own a 1992 Porsche 928 S?

Total estimated annual running cost is £2,888 (£241/month), broken down as £1,958 fuel, £375 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 72% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 1992 Porsche 928 S

At 34 years old, the Porsche 928 S is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 1990 model has the highest pass rate at 84%. Note: with only 58 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Timing Chain / Belt

Watch out

At 34 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.

Oil Consumption

Medium risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Clutch Wear

Watch out

With an average of 119k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.

Brake Discs and Pads

Medium risk

High-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 1992 Porsche 928 S stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Porsche 928 S(1992)	72%	£1,958	£375	Grp 35-50	£2,888
Mercedes SL(1994)	88%	£1,958	£375	Grp 35-50	£2,738-£150
Jaguar XJS(1990)	82%	£1,958	£375	Grp 35-50	£2,738-£150
TVR Chimaera(1994)	83%	£1,958	£375	Grp 35-50	£2,738-£150
Mercedes 500(1991)	87%	£1,958	£375	Grp 35-50	£2,738-£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 1992 Porsche 928 S

Is the 1992 Porsche 928 S reliable?

Average reliability. Expect some repairs as it ages. 72% of MOT tests on 1992 Porsche 928 Ss ended in a pass, from 58 tests (DVSA MOT data for tests in 2024, retests included). That's 10 points below the average of 82% across all models in the same data.

How much does a 1992 Porsche 928 S cost to run?

Our estimate is £2,888 a year (£241 a month): £1,958 fuel, £375 road tax, £55 MOT and £500 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 1992 Porsche 928 S?

72% of 58 MOT tests on the 1992 Porsche 928 S ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 130th of 172 models first registered in 1992 (bottom 25%).

Which year Porsche 928 S has the best MOT pass rate?

Of the years with at least 100 tests, the 1990 Porsche 928 S has the highest MOT pass rate at 84% and the 1991 the lowest at 81%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 1992 Porsche 928 S?

The average mileage recorded at MOT tests on the 1992 Porsche 928 S is 118,583 miles, which is below the expected 236,800 miles for a 32-year-old car. This suggests lighter use than average, which generally means less wear on major components.