Where each one leads
Audi TT Roadster
- On Canada's official test the most frugal 2023 Audi TT Roadster uses 9.4 l/100 km, the 2025 Porsche 718 Boxster S 10.9.
- New Audi TT Roadster cars registered in Europe in 2022 average 167 g/km of CO₂ on the WLTP test, against 220 for the Porsche 718 Boxster S in 2022.
Porsche 718 Boxster S
Ahead on none of the like-for-like measures.
Only measures that do not depend on how many cars were sold: pass and failure rates against cars of the same age, ratings, fuel use and CO₂. How we compare
At a glance
| Audi TT Roadster | Porsche 718 Boxster S | |
|---|---|---|
| Model years in the US safety record | 2009–2023 | 2017–2024 |
| New cars registered in Europe | 17,041 (2010–2022) | 6,488 (2016–2022) |
| On the road in the Netherlands | 703 | — |
EEA new-car registrations (CC BY 4.0) · DVLA licensed vehicles (OGL v3.0) · RDW (CC0) · Traficom (CC BY 4.0) · generations: Wikidata (CC0).
Reliability and problems
| Audi TT Roadster | Porsche 718 Boxster S | |
|---|---|---|
| Illogical odometer records (NL) | 4.3% | — |
| US owner complaints | 7 | — |
| Most complaints about | Service brakes | — |
| Model year with most complaints | 2016 (3) | — |
| US recall campaigns | 3 | 1 |
| Manufacturer service bulletins | 3,120 | 923 |
Complaint, recall and bulletin counts grow with the number of cars sold and are not adjusted for it. UK MOT: DVSA anonymised MOT results (OGL v3.0); New York: DMV inspections; complaints, recalls, bulletins and investigations: NHTSA (public domain); odometer: RDW (CC0).
Fuel, emissions and price
| Audi TT Roadster | Porsche 718 Boxster S | |
|---|---|---|
| Official combined fuel use, Canada | 9.4 l/100 km (2023) | 10.9 l/100 km (2025) |
| Real-world use in Europe, petrol | 8.5 l/100 km | — |
| Official CO₂ of new cars in Europe | 167 g/km | 220 g/km |
| Average power of new cars in Europe | 162 kW (217 hp) | 257 kW (345 hp) |
| Average mass in running order | 1,477 kg | 1,458 kg |
| Dutch list price when new (median) | €70,216 | — |
Canada: NRCan Fuel Consumption Ratings, most frugal version of the latest year (OGL Canada). Europe: EEA monitoring of new-car CO₂ and on-board fuel meters (OBFCM), CC BY 4.0. Price: RDW catalogue price (CC0). Finland: Traficom (CC BY 4.0).