How much does a 1991 AUDI 100 cost to run?

Estimated annual running cost is £2,427 (£202/month), including £1592 fuel, £430 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 1991 AUDI 100?

The 1991 AUDI 100 has a 89% MOT pass rate based on 54 tests in 2026. This ranks 39 out of 179 cars from 1991.

Which year AUDI 100 is most reliable?

The 1991 AUDI 100 has the highest MOT pass rate at 89%. The least reliable year is 1994 at 77%.

AUDI 100 (1991)

Q: Is the 1991 AUDI 100 reliable?

Good reliability. Occasional issues but generally solid. 89% of AUDI 100s from 1991 passed their MOT first time in 2026, based on 54 tests. That's 7 points above the national average of 82%.

Q: What is the average mileage for a 1991 AUDI 100?

The average mileage for a 1991 AUDI 100 is 129,101 miles, 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.

Running costs, reliability data, and common problems from 54 real MOT tests.

Annual Cost

£2,427

£202/month

MOT Pass Rate

89%

Good

Road Tax

£430

Based on CC/year

Insurance

Grp 25-38

2309cc Petrol

Solid Option

89% pass rate, £2427/year to run. 7 points above average.

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Petrol2309cc35 years old54 tests129k miles avg

Annual Running Costs

Fuel (Petrol, 2309cc)

~30 mpg

£1,592

Road Tax

Based on 2309cc

£430

MOT Test

£55

Predicted Repairs

£350

Total per year£2,427

Per month£202/mo

Per week£47/wk

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

89% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 7 points above the national average of 82%.

At 35 years old, 89% of AUDI 100s from 1991 passed their MOT first time in 2026. That's based on 54 tests across the UK. The average mileage at this age is 129,101 miles.

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How Does It Compare?

Rank among 1991 cars39th of 179(top 22%)

Rank among AUDI models765th of 1,079(top 71%)

vs national average+7%(82% avg)

vs 1991 cars average+11%(78% avg)

vs AUDI average-1%(90% avg)

Mileage Analysis

129,101

Average miles

259,000

Expected for age

The average 1991 AUDI 100 has 129,101 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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AUDI 100 by Year

Year	Pass Rate	Tests	Avg Mileage
1994	77%	95	165,828 mi
1993	79%	43	167,094 mi
1992	92%	49	156,538 mi
1991	89%	54	129,101 mi
1990	83%	58	129,885 mi

Similar Cars to Consider

BMW 3 SERIES

1990 · 1990cc Petrol

£1,867/year

84%

-5%

MERCEDES 190 E

1992 · 1997cc Petrol

£2,017/year

79%

-10%

SAAB 900

1993 · 1985cc Petrol

£2,017/year

73%

-16%

FORD ESCORT

1993 · 1993cc Petrol

£1,867/year

83%

-6%

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About the 1991 AUDI 100

The 1991 AUDI 100 is a premium with a 2309cc petrol engine. 54 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 22% of all 1991 cars for reliability.

With an average of 129,101 miles at 35 years old, AUDI 100 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 AUDI 100 Fuel Costs

The 2309cc petrol engine offers a reasonable balance between performance and economy. 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 AUDI 100?

Total estimated annual running cost is £2,427 (£202/month), broken down as £1592 fuel, £430 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 89% pass rate. Keeping on top of servicing will help avoid surprises.

AUDI 100 Reliability Trend

The AUDI 100 has maintained consistent MOT pass rates across model years, varying by only 0 percentage points.

Buying a Used 1991 AUDI 100

At 35 years old, the AUDI 100 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. Note: with only 54 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 1991 AUDI 100's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 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 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 129k 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.

Engine Mounts

Medium risk

Worn engine mounts cause excessive vibration and movement. Replacement costs £150-£400 per mount. Check for vibration at idle with the bonnet open.

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 1991 AUDI 100 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
AUDI 100(1991)	89%	£1592	£430	Grp 25-38	£2427
BMW 3 SERIES(1990)	84%	£1327	£135	Grp 18-32	£1867-£560
MERCEDES 190 E(1992)	79%	£1327	£135	Grp 18-32	£2017-£410
SAAB 900(1993)	73%	£1327	£135	Grp 18-32	£2017-£410
FORD ESCORT(1993)	83%	£1327	£135	Grp 18-32	£1867-£560

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.