V8 4.2 litre
* 90° angle design
* 5 valve per cylinder heads
* Timing belt
* Shares architecture with the 2.8 litre 40 valve V6 engine in Passats, et. al.

W12 6.0 litre
* 70° angle design (90° effective angle, outer bank to outer bank)
* 4 valve per cylinder heads
* Timing chain
*Share architecture with the 4.0 litre 32 valve W8 engine in the Passat.

The W12 in the '06 and higher Phaetons has a dry-sump lubricating system whereas the previous engines (and the W8) do not.

Ginge