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Audi A4 allroad vor 50 tdi quat a vs Audi A6: reliability comparison

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

Audi A4 allroad vor 50 tdi quat a
86%
MOT pass rate · 16 vehicles
Audi A6
78%
MOT pass rate · 246,602 vehicles
Verdict: On MOT pass rate the Audi A4 allroad vor 50 tdi quat a (86%) and Audi A6 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Audi A4 allroad vor 50 tdi quat a Audi A6
MOT pass rate 86% ✓ 78%
MOT failure rate 14% ✓ 22%
Faults & advisories per test 0.6 ✓ 1.7
Dangerous-fault share 7% 2% ✓
Average mileage 48,264 mi 136,441 mi
Sample size (vehicles) 16 246,602

Most common faults

Audi A4 allroad vor 50 tdi quat a

  1. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Rear Tyre has a cut in excess of the requirements deep enough to reach the ply or cords (5.2.3 (d) (i))
  3. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Front Tyre slightly damaged/cracking or perishing Both (5.2.3 (d) (ii))
  5. Front Tyre worn close to legal limit/worn on edge Both wearing on inner edges (5.2.3 (e))
  6. Nearside Front Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i))

Audi A6

  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 Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  6. Offside Rear Tyre worn close to the legal limit (4.1.E.1)

Reliability FAQ

On MOT pass rate the Audi A4 allroad vor 50 tdi quat a (86%) and Audi A6 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Audi A4 allroad vor 50 tdi quat a report Full Audi A6 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.