Audi fights to keep legendary 5-cylinder engine alive — hybrid boost and more models on the table

Audi's iconic inline-5-cylinder turbocharged engine, known as the EA855 series, is facing an uncertain future as European emissions regulations tighten. The automaker has been gradually phasing out the engine in favor of high-output 4-cylinder units, which deliver better fuel economy and lower CO₂ emissions. Given the relatively small production volumes of the EA855, investing in its compliance with stricter norms may no longer be economically viable.

Nevertheless, Audi is determined to preserve the legendary five-cylinder. Rolf Michl, head of Audi Sport, confirmed that the company continues to evaluate the engine's future prospects. One proposed solution is to expand the range of models that can be equipped with the EA855. Increasing the number of vehicles using the engine would boost production volumes, helping to offset the costs of necessary upgrades.

Another approach under consideration is hybridization — a strategy already widely adopted across the European automotive industry. In a hybrid configuration, the EA855 would only engage when high power output is required. The rest of the time, the vehicle could operate on electric power. This would significantly reduce average fuel consumption and emissions, making the engine compliant with the EU's increasingly stringent environmental standards without sacrificing its distinctive character.