For those who haven’t driven a diesel-powered automobile since the days of the smoke-belching Mercedes-Benz 300D, forget everything you know about diesel power. Standing next to the A8 L TDI, you can scarcely tell that the engine is not a gasoline power plant. Inside, quiet reigns supreme thanks to dual-pane acoustic side windows and slippery aerodynamics that cheat wind and wind noise. Even the sporty 20-inch, 10-spoke aluminum wheels and 40-series tires do not conspire to disrupt the smoothness and tranquility of the ride.
Full review at robbreport.com.