Parkers overall rating: 4.5 out of 5 4.5

The RS6's cabin is similar to the standard A6 - but that's not a bad thing. Build quality is superb, as is the finish and all the switches and controls work with real precision. The range-topping car differentiates itself by having a flat-bottomed sports steering wheel, carbon fibre trim on the centre console and doors, brushed chrome switches and alloy pedals.

The driving position is excellent and the supportive Recaro sports seats add to the special feeling - they're also adorned with bold RS6 logos and so is the rev counter. Overall it has the air of a high quality, high performance machine - but ultimately it doesn't feel like a car with a £75,000 price tag from the driver's seat.

The RS6 is fitted with an hydraulically controlled suspension system called Dynamic Ride Control (or DRC for short) which features three selectable modes - comfort, dynamic and sport. The comfort setting is fine for everyday driving and gives the Audi a supple ride that is fairly forgiving over rough surfaces, although it can be caught out by potholes.

Dynamic is a little firmer and good for more demanding roads but the sport setting is extremely stiff and anything but a completely smooth road surface results in a crashy and uncomfortable drive for all on board. The standard leather and Alcantara sports seats offer excellent support and are even comfortable on longer journeys too.