MPG City: 18 ; Highway: 27
The S6 is the muscle car of the A6 line, highlighted by its 4.0-liter V-8 engine with twin turbochargers. The V-8 makes 450 hp for 2016, an increase of 30 hp. The engine teams with a seven-speed dual-clutch automatic transmission. Quattro all-wheel drive is standard.Side-by-Side Comparison
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