Fuel, Exhaust & Engine Electrics
Page 2.7
Piston Recesses
The piston recesses -1- on the V6 engine have been adapted for the
purpose of achieving optimal stratification of the air/fuel mixture during
the late injection processes that characterize high pressure stratified
charge ignition as well as during the catalytic converter heating phase.
The compression ratio has been increased from 11.5:1 to 12.25 due to
improved inner cooling. This reduces fuel consumption and optimizes
engine power.