Head to head · Coupe
Audi A5 vs BMW 4 Series
On the measures that matter most to a used buyer — value retention, reliability, fuel economy and insurance — the Audi A5 comes out ahead of the BMW 4 Series, winning 3 of the 4 categories where the two differ.
| Measure | Audi A5 | BMW 4 Series |
|---|---|---|
| Est. value, ~3 years old | £23,900 (2023, 30,500 mi) | £28,500 (2023, 28,000 mi) |
| Value kept after 3 years | 64% | 64% · wins |
| Reliability (MOT-derived, /100) | 75 · wins | 73 |
| Average mpg | 43 · wins | 38 |
| Insurance group | 39 · wins | 41 |
| Road tax / year | £200 | £200 |
| Typical annual service | £290 | £290 |
Valuations are each model's ~3-year-old example at typical mileage, through the same model behind the profiles. Adjust mileage, trim and condition in the interactive comparison →
A5 vs 4 Series — quick answers
Which is more reliable, the A5 or the 4 Series?
The Audi A5 scores higher on Forecourt's MOT-derived reliability measure — 75 against the BMW 4 Series's 73 out of 100.
Which holds its value better, the A5 or the 4 Series?
The BMW 4 Series — it keeps about 64% of its original price after three years, against 64% for the Audi A5.
How much does a used A5 cost compared with a 4 Series?
A roughly three-year-old Audi A5 is worth about £23,900 at typical mileage, against about £28,500 for the equivalent BMW 4 Series.