Category: Exotic Sports 
Price Range: £76,090 to £76,090
Looks better than the estate, ballistic performance, phenomenal V10 engine.
Not as engaging to drive as an M5, thirst hampers range.
Audi comes close to making a four-door Lamborghini.
Since it's the saloon and not the desirable load-lugging estate, we expect it to fare less well on the used market.
The regular A6 range has residuals of 40-48% for the most popular diesel Avant. In the past the performance models haven't fared quite so well: the S6, which also draws on the Lamborghini V10, barely claws back 35% of its value three years and 36,000 miles down the line, but we expect the RS6 will draw a premium among the hardcore enthusiasts.
