The Audi S6 is essentially a sporty version of the Audi A6. The Audi S6 is powered by a 4.0L DOHC twin-turbocharged V8 engine, paired with a 7-speed S-tronic dual-clutch transmission. This engine develops nearly 420 horsepower, not to mention its cylinder deactivation system and stop-start system for improved fuel economy. Book a road test today at any CCAQ member Audi dealerships to learn more about the Audi S5. If you are looking for new or used vehicles for sale in Quebec, you've come to the right place! Select the Audi model that suits you best.