Euro 7 Regulations Threaten Future of Audi’s 2.5-Liter Turbocharged Engine

Summary Audi Sport is actively exploring ways to keep its legendary 2.5-liter five-cylinder engine alive for another generation.Strict Euro 7 emissions rules demand costly hardware overhauls that are difficult to justify on a niche, low-volume engine. The distinctive roar of the Audi RS3 might not be silenced just yet. For half a century, the odd-cylindered inline-five engine has served as a…