The distinguished five-cylinder engine, long a signature of Audi's performance vehicle lineup, is approaching its final chapter. This engineering marvel, renowned for its unique sound and potent delivery, is succumbing to the escalating pressure of global emissions standards. Despite its technical قابلیت for modification to meet future regulations, Audi has determined that the financial commitment and engineering resources required are not justifiable given the relatively niche market for its primary application, the RS3. This decision signifies the conclusion of a significant era in automotive history, spanning several decades of innovation and powerful performance.
The inline-five engine, a staple in models like the TT and RS Q3 before their discontinuation, now only powers the RS3. However, even this model's tenure with the distinctive engine is limited. Within approximately two years, the final RS3 equipped with the turbocharged 2.5-liter engine will cease production at Audi's Ingolstadt facility. The primary catalyst for this phasing out is the tightening global emissions regulations. Specifically, the impending Euro 7 standards, set to take effect for newly launched vehicles in November 2026, pose a significant challenge. While the current RS3 receives a temporary exemption, all vehicles sold in EU7 markets must comply with these more rigorous rules by November 2027.
Audi CEO Gernot Döllner, in an interview with Australia's Drive magazine, acknowledged that adapting the five-cylinder engine to meet Euro 7 standards would not be technically difficult. However, he emphasized that the decision not to pursue this adaptation is a matter of "scale and overall market demand." The sales volume of the RS3 Sportback and RS3 Sedan is simply insufficient to warrant the substantial investment in engineering and development required for compliance. Consequently, the five-cylinder engine is expected to be retired with the full implementation of Euro 7. Although a theoretical possibility exists for its continuation in non-EU7 regions, Audi's market analysis likely indicates that such an endeavor would be economically unsustainable.
The announcement regarding the engine's future was made at the IAA Mobility Show in Munich, where Audi unveiled the Concept C. When questioned about the possibility of a combustion engine variant for the targa-topped sports car, Audi firmly rejected the notion, confirming that the production version, slated for 2027, will be exclusively electric. This vehicle is anticipated to utilize a Volkswagen Group platform, likely shared with the electric Porsche Boxster and Cayman models. The idea of an inline-five engine positioned behind the seats, while conceptually appealing, will not materialize. Similarly, an earlier consideration for an entry-level R8 featuring the inline-five, rear-wheel drive, and a manual transmission never progressed beyond the planning stages.
Regarding the RS3's future, Döllner refrained from commenting on the likelihood of a four-cylinder replacement. This leaves the direction of the next-generation RS3 uncertain, especially given Audi's prior stance against developing a four-cylinder RS model and the impending all-electric shift for vehicles like the ninth-generation Golf. In the interim, Audi is preparing a powerful version of the RS3 as a send-off. There are also indications that Volkswagen may incorporate the inline-five engine into the ultimate Golf model before the complete transition to electric powertrains. This would not be an unprecedented move within the VW Group, as Cupra has previously featured the EA855 engine in its Formentor VZ5. The eventual retirement of the 2.5 TFSI engine will bring to a close a legacy that began in 1976 with the pioneering five-cylinder Audi 100 (C2), marking the end of an iconic automotive chapter.