CHEVROLET GMC CORVETTE (1991)
Running costs, reliability data, and common problems from 37 real MOT tests.
Annual Cost
£2,907
£242/month
MOT Pass Rate
76%
Average
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
5665cc Petrol
Check Carefully
76% pass rate, £2907/year to run. 6 points below average.
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Annual Running Costs
~30 mpg
Based on 5665cc
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Average reliability. Expect some repairs as it ages. That's 6 points below the national average of 82%. It falls below the CHEVROLET GMC brand average of 84%.
At 35 years old, 76% of CHEVROLET GMC CORVETTEs from 1991 passed their MOT first time in 2026. That's based on 37 tests across the UK. The average mileage at this age is 82,625 miles.
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How Does It Compare?
Mileage Analysis
82,625
Average miles
259,000
Expected for age
The average 1991 CHEVROLET GMC CORVETTE has 82,625 miles on the clock, which is significantly below the expected 259,000 miles for a 35-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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Best Year to Buy?
The most reliable year is the 1999 model with a 100% MOT pass rate, while the 1990 model has the lowest at 82%. The 1991 sits between the two at 76%.
CHEVROLET GMC CORVETTE by Year
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About the 1991 CHEVROLET GMC CORVETTE
The 1991 CHEVROLET GMC CORVETTE is a performance with a 5665cc petrol engine. 37 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 1991, the average MOT pass rate is 78%, and this model falls short of that benchmark.
With an average of 82,625 miles at 35 years old, CHEVROLET GMC CORVETTE owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
1991 CHEVROLET GMC CORVETTE Fuel Costs
The 5665cc 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 £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 1991 CHEVROLET GMC CORVETTE?
Total estimated annual running cost is £2,907 (£242/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 76% pass rate. Keeping on top of servicing will help avoid surprises.
CHEVROLET GMC CORVETTE Reliability Trend
Newer CHEVROLET GMC CORVETTEs show better MOT pass rates than older ones, with an average improvement of 17 percentage points.
Buying a Used 1991 CHEVROLET GMC CORVETTE
At 35 years old, the CHEVROLET GMC CORVETTE 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 1999 model has the highest pass rate at 100%. Note: with only 37 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 1991 CHEVROLET GMC CORVETTE's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 35 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 riskLarger 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 outAt 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 outRubber 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
Medium riskWith an average of 83k 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 riskHigh-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 riskAlways 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 1991 CHEVROLET GMC CORVETTE stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| CHEVROLET GMC CORVETTE(1991) | 76% | £1592 | £760 | Grp 35-50 | £2907 |
| JAGUAR XJS(1990) | 82% | £1592 | £250 | Grp 35-50 | £2247-£660 |
| JAGUAR XJ(1993) | 82% | £1592 | £250 | Grp 35-50 | £2247-£660 |
| JAGUAR XJR(1990) | 89% | £1592 | £250 | Grp 35-50 | £2247-£660 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
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