Porsche 911 Carrera 4 Brochure & Specs page 64

Fuel. Noise.
The 911 is already designed to The 911 complies with all appli-
operate on fuels with an ethanol cable noise regulations without
content of up to 10 %. Ethanol any form of engine encapsulation.
has a positive impact on the CO To achieve this, noises are elimi-
2
balance since the plants grown nated at source. Engine parts are
for the production of this biofuel stiff, moving parts are lightweight
also absorb CO from the and tolerances are kept to a
2
atmosphere. minimum. Large-volume silencers
and resonators in the air intake
The release of hydrocarbons from system minimise noise further.
the fuel system is minimal. This For the entire service life of the
is achieved through an active vehicle.
carbon filter and a special coating
on the fuel tank. The high-pressure
Servicing.
section of the fuel system is made
of stainless steel, while vapour-
carrying lines are made from Long service intervals offer
multi-layered plastic. clear advantages. For you: lower
costs and saved time. For the
environment: the use of fewer
consumables and replacement
parts. For full details of service
intervals, please refer to the
separate price list.
The 911 |
Environment
911 Targa 4