The A8 is a fantastic car, with its W12 6.3L engine, but I did some thinking and realized 500BHP is not enough. Then I though "Oh a Bentley Supersports engine!". It's a 6.0 W12, which theoretically is smaller then the 6.3L W12. Then you take the transmission setup as well because the 8-Speed would tear into shreds with the 590 ft. lbs. TQ. in the Bentley. That would put the Audi somewhere in the low 4 second range. Is it possible to fit Bentley's 6.0 W12 found in the Supersports models into the A8?