For 2014, a diesel V6 joins the A8's engine lineup. Additionally, certain option packages have been reshuffled and renamed, and all Audi A8s now have standard keyless ignition and a power-operated trunk lid.

Audi has typically trailed its Teutonic rivals in the luxury-car sales race. However, as the 2014 Audi A8 illustrates, this sales ranking should not be construed as a reflection on the relative quality of the manufacturer's products. With a gorgeous cabin and handling that's distinctly and gloriously German, the A8 is, from roof to rubber, a class act that succeeds at elevating the driving experience in the large luxury sedan class.

Audi tweaked the formula last year by revamping its engine lineup for the full-size A8. For the first time, base models were powered by a V6, and that switch has proven to be quite satisfying from a performance and efficiency standpoint. A new turbocharged V8 also debuted as a midlevel choice. Now for 2014 the engine lineup sees another change, with the addition of a 3.0-liter diesel V6. Performance is quite satisfactory, with a 0-60 mph time of 6.3 seconds along with fuel economy that's the most frugal in the high-end luxury sedan segment: 24 mpg city/36 mpg highway and 28 mpg combined.