Rare Aston Martin estate appears in US auctionBNPS

An ultra-rare Aston Martin estate has surfaced at an exclusive auction in Florida.

Experts have valued the DB6 shooting brake at over £400,000 – twice what a standard DB6 saloon of similar specification would be worth.

The idea of converting the popular grand tourer into an estate was first mooted by Aston Martin boss David Brown, who wanted to be able to carry his dogs and hunting gear around.

He had renowned London coachbuilder Harold Radford convert a DB5 for his own use, but demand soon grew to the point where Aston Martin made arrangements with the coachbuilder to convert more cars for customers.

The DB6 replaced the iconic DB5 model in 1965, improving the old car's aerodynamics and increasing the luxury while retaining the DB5's charm and style.

This example in Vantage specification is powered by a 4.0-litre six-cylinder engine producing 325bhp, one of only six DB6 estates built by Radford.

According to the original build notes that come with the car, it was converted from new to the specifications of one 'James Harrison of Madison Avenue', who could have been one of the original advertising Mad Men.

The DB6 saloon would have cost £5,000 new, with the Radford conversion an extra £2,000 on top of that – around £107,000 in today's money – and came with air conditioning and power steering.

The left-hand drive car was estimated to sell for around £400,000 this week, but failed to sell at the Boca Raton Concours D'Elegance auction in Florida.