Skip to content

Audi 20t vs Audi A4: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Audi 20t
82%
MOT pass rate · 2 vehicles
Audi A4
76%
MOT pass rate · 568,515 vehicles
Verdict: On MOT pass rate the Audi 20t (82%) and Audi A4 (76%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi 20t Audi A4
MOT pass rate 82% ✓ 76%
MOT failure rate 18% ✓ 24%
Faults & advisories per test 0.6 ✓ 1.9
Dangerous-fault share 0% ✓ 2%
Average mileage 119,010 mi 133,841 mi
Sample size (vehicles) 2 568,515

Most common faults

Audi 20t

  1. Central Front Registration plate deteriorated but not likely to be misread (0.1 (b))
  2. Central Rear Registration plate deteriorated but not likely to be misread (0.1 (b))
  3. Offside Front Tyre worn close to legal limit/worn on edge inner shoulder (5.2.3 (e))
  4. front brake juddering slightly (3.7.A.2b)
  5. Nearside Rear Tyre tread depth below requirements of 1.6mm (4.1.E.1)
  6. Nearside Front Tyre worn close to the legal limit (4.1.E.1)

Audi A4

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  3. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  4. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  5. Under-trays fitted obscuring some underside components
  6. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Audi 20t (82%) and Audi A4 (76%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi 20t report Full Audi A4 report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.