Used Audi A3 8V Sportback (2012–20) vs SEAT Leon Mk3 (2012–20)
Figures updated
Shopping for a used family hatchback? We compare the Audi A3 8V Sportback (2012–2020) and SEAT Leon Mk3 (2012–2020), which were on sale at the same time, on size, boot space, performance, safety and running costs, plus how cars of their age do in real MOT tests.
The short answer
The Audi A3 8V Sportback comes out ahead, with the better MOT record; the SEAT Leon Mk3 is close on everything else.
- Their boots are much the same size: Audi A3 8V Sportback 380 litres, SEAT Leon Mk3 380 litres.
- The Audi A3 8V Sportback has the better MOT record for its age: the Audi A3 8V Sportback fails its MOT 23% less often than average for its age (20% of Audi A3s built 2012–2020 failed first time in 2024, against 26% of all cars that age), while the SEAT Leon Mk3 fails its MOT 10% less often than average for its age (21% of SEAT Leons built 2012–2020 failed first time in 2024, against 24% of all cars that age).
| Figure | Audi A3 8V Sportback8V Sportback (2012–2020), 5-door hatchback | SEAT Leon Mk3Mk3 (2012–2020), 5-door hatchback |
|---|---|---|
| Price and practicality | ||
| Body | 5-door hatchback | 5-door hatchback |
| Seats | 5 | 5 |
| BootSeats up / folded | 380 litres / 1,220 | 380 litres |
| Length | 4,313mm | 4,263mm |
| WidthWithout mirrors | 1,785mm | 1,810mm |
| Height | 1,426mm | 1,446mm |
| Performance | ||
| Power | 105–310 PS (best) | 86–184 PS |
| 0–62mph | 4.6–11.2 sec | – |
| Safety | ||
| Euro NCAP ratingTests get tougher each year | ★★★★★ (2012) | ★★★★★ (2012) |
| Economy and emissions | ||
| Fuel types | Diesel | – |
| Official economyVersions of this generation | 55.4–72.4 mpg | – |
| CO2 | 103–133 g/km | – |
| Running costs at 7,500 miles a year | ||
| Diesel198.4p a litre | £1,030 (65.7 mpg) | – |
| Cheapest version to fuelWhichever fuel costs least | £1,030 (diesel) | – |
| Car tax, registered 2001 to 2017Taxed on CO2; newer cars pay a flat £200 | £20 to £790 | – |
| Reliability from real MOT tests | ||
| Reliability score | 124Well above average (best) | 116Well above average |
| Failed first time, cars of this generation's ageUK rate for cars the same age in brackets | 19.7% (25.6%)built 2012–2020 (best) | 21.1% (23.6%)built 2012–2020 |
| Failed MOT first time (ages 3–20) | 24.9% | 23.6% (best) |
| Failed at 3 years old | 10.7% (best) | 12.3% |
| Failed at 5 years old | 12.3% (best) | 18.3% |
| Failed at 10 years old | 23.6% | 24.3% |
| Most common MOT fault | Tread depth (2.9% of tests) | Coil spring (2.8% of tests) |
| Fails more than average on | Nothing stands out | Nothing stands out |
| MOT tests analysed | 410,672 | 181,734 |
| About the cars | ||
| Type | Family hatchback | Family hatchback |
| Owners' average miles a year | 8,900 | 9,400 |
| On sale | 2012–2020 | 2012–2020 |
Green marks the better figure where the difference is more than 3%. Reliability figures cover every version of each model tested in the year. Running costs use the typical official economy of recent versions (WLTP where available); real-world economy is usually a little worse for every car.
More comparisons
Frequently asked questions
›Is a used Audi A3 8V Sportback or SEAT Leon Mk3 more reliable?
The Audi A3 8V Sportback. Compared with all cars the same age, the Audi A3 8V Sportback fails its MOT 23% less often than average and the SEAT Leon Mk3 10% less often than average (DVSA MOT tests, 2024). Because they're different ages, their raw rates differ: 19.7% of Audi A3s built 2012–2020 failed first time, and 21.1% of SEAT Leons built 2012–2020. Whatever you buy, check the MOT history of the exact car.
›Which is bigger, the Audi A3 8V Sportback or the SEAT Leon Mk3?
The Audi A3 8V Sportback is 50mm longer (4,313mm against 4,263mm). Their boots are much the same: 380 and 380 litres.
›Which is safer, the Audi A3 8V Sportback or the SEAT Leon Mk3?
Euro NCAP gave the Audi A3 8V Sportback 5 stars (2012) and the SEAT Leon Mk3 5 stars (2012). Euro NCAP makes its tests tougher every few years, so ratings from different years aren't directly comparable.
›Should I buy the Audi A3 8V Sportback or the SEAT Leon Mk3?
The Audi A3 8V Sportback comes out ahead, with the better MOT record; the SEAT Leon Mk3 is close on everything else. The comparison above sets out price, space, performance, safety, running costs and reliability side by side.
Sources: manufacturers' UK specifications and price lists and Euro NCAP (listed on each model's page); DVSA anonymised MOT tests 2024 (Open Government Licence v3.0); Vehicle Certification Agency car fuel data, © Crown copyright, VCA cannot accept liability for its accuracy; fuel prices from the GOV.UK Fuel Finder scheme. Photos from Wikimedia Commons, credited under each picture.