Head to head · Convertible
Mazda MX-5 vs Porsche 718 Boxster
On the measures that matter most to a used buyer — value retention, reliability, fuel economy and insurance — the Mazda MX-5 comes out ahead of the Porsche 718 Boxster, winning 2 of the 3 categories where the two differ.
| Measure | Mazda MX-5 | Porsche 718 Boxster |
|---|---|---|
| Est. value, ~3 years old | £17,150 (2023, 17,000 mi) | £37,450 (2023, 16,500 mi) |
| Value kept after 3 years | 64% | 64% |
| Reliability (MOT-derived, /100) | 66 | 76 · wins |
| Average mpg | 43 · wins | 30 |
| Insurance group | 40 · wins | 48 |
| Road tax / year | £195 | £195 |
| Typical annual service | £185 · wins | £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 →
MX-5 vs 718 Boxster — quick answers
Which is more reliable, the MX-5 or the 718 Boxster?
The Porsche 718 Boxster scores higher on Forecourt's MOT-derived reliability measure — 76 against the Mazda MX-5's 66 out of 100.
How much does a used MX-5 cost compared with a 718 Boxster?
A roughly three-year-old Mazda MX-5 is worth about £17,150 at typical mileage, against about £37,450 for the equivalent Porsche 718 Boxster.