I think the Quality of the w12 is better
By Get the w 12 on
2004 Audi A8 L quattro AWD 4dr Sedan (4.2L 8cyl 6A)
I have a 12 cylinder A8 and i love it. It beats my 760li, S65 AMG and my M5. All the problems listed below are probably only with the 8 cylinder. Audi Probably decided to make the w12 better mecanicly to help boost sales on it. I have barly driven my 3 other sedans ever since i got this car, Ive barly drivin my Aston Martin convertable. If you want a powerful, fast, brand name luxery car. Tou can not go wrong with this car. In my 7 months of owning it I haven't had one pronlem.
The Backseat Refrigerator, The GPS system and the soundsystem. Ohh I forgot to mention the built in seat massagers and seat warmers.