Officially the DB7 was never available with the V8 engine. But at least two cars have been built (under different circumstances) with the Newport Pagnell, hand built , Tadek Marek V8.

For the 1995 Le Mans 24 hour race, Michel Hommell, a French publishing millionaire, created a DB7 complete with a 6.3 litre V8 and destined to compete in the GT1 class. The car was built by Synergie, a Le Mans based constructor: significantly lighter than the standard car at 1330kg with carbonfibre doors, wings and bonnet. The engine was built in the UK by R. S. Williams - effectively a detuned version of the AMR1 V8 with an output 619 bhp mated to a six speed ZF gearbox.

Hastily prepared for the qualifying weekend and driven by Eric Helary and Alain Cudini, the car failed to qualify for the 1995 race by the narrowest of margins. It was unfortunate as the DB7 had become victim of the intense rivalry between the other GT1 cars, the McLaren F1 and Ferrari F40 GTE. Despite being on the reserve list, it didn't race in anger; it's owner was so exasperated being classified below 3 others, he retired the car. I believe that if the car was able to be entered in the GT2 class, it would have raced, and maybe even finished. The car now resides in the owners motor museum, Manoir de l'Automobile, in Brittany, France.