A unique Aston Martin DB7, fitted by the factory with a 452 bhp engine from a V8 Vantage, is to be sold at the Historics at Brooklands auction on Saturday September 1st.

The Aston Martin DB7 launched with a Jaguar-derived straight six 335 bhp engine, with a 420 bhp V12 added later. One would have thought that was a broad enough choice, but one member of the Saudi Arabian Royal family asked Aston Martin to insert a 6350cc V8 engine under the bonnet. That engine was a racing version of the classic 5.3 litre V8 made since the early 1970s.

The styling is only subtly different, with a bulging bonnet being the only real hint that there is something special in the engine department. As well as the unique engine, AP Racing brakes have been fitted, whilst the suspension and steering have also been uprated.

Finished in Cheviot red paintwork and parchment leather seating piped in oxblood, with matching claret carpets, the DB7 V8 has covered just 3,220 miles from new, and Historics expects this one-of-a-kind car to attract offers of between £70,000 and £80,000 at auction on Saturday September 1st.

One has to say that, whilst a DB7 V8 is the answer to a question almost no-one would think of asking, the conversion has been done with a level of good taste that is not always associated with one-off customisations for rich clients. It must also be quite an interesting car to drive: the DB7, with its Jaguar XJS roots, is the most feline of Aston Martins, while the old-school bellowing V8 engine comes from the traditional Astons of the 1970s and 1980s. Imagine a Siamese cat with the bark of a bulldog.