There are very few cars that manage to be truly outrageous and entirely sensible at the same time.

The C7.5-generation Audi RS6 Avant is one of them; a car that delivers bona fide supercar performance while remaining perfectly capable of handling school runs, tip runs, ski trips and IKEA expeditions without breaking a sweat.

Powered by Audi’s twin-turbocharged 4.0-litre V8, the RS6 produces a scarcely believable 560bhp, delivered to all four wheels via Audi’s Quattro system and an 8-speed Tiptronic gearbox.

The result is 0–62mph in around 3.9 seconds; a figure that still feels faintly absurd when you remember this is a large estate car with room for five adults and their luggage.

With full Audi Service History and finished in Prisma Silver pearlescent paint, this example presents exactly as you’d hope, with just 56,000 miles on the odometer.

The colour really suits the RS6’s subtly menacing design perfectly; understated enough to fly under the radar, but unmistakably muscular to t...