Technical data

Audi g-tron
®
Getting ahead. Ahead with less CO₂.
sturdy glass fibre reinforced plastic (GFRP)
lightweight carbon reinforced plastic (CRP)
gas-tight polyamide
Efficiency potentials can be exploited even more
consistently through the intelligent combination
of tried-and-trusted technologies with
alternative fuels. The Audi A3 Sportback g-tron
for example is the first standard Audi model to
have a bivalent drive in the form of pioneering
TFSI technology with CNG modification. It
is based on the tried-and-trusted 1.4 litre
4-cylinder TFSI engine which has had its cylinder
head, turbocharging, injection system and
catalytic converter adapted to the specific
properties of natural gas. The natural gas is
stored at up to 200 bar in two lightweight high-
pressure tanks at the rear behind the normal
petrol tank. Each tank holds 7 kg CNG. When
the 14 kg of high-compression natural gas have
been used up, the system switches automatically
to TFSI operation under 10 bar system pressure
and without you noticing a thing.
In pure CNG operation, the Audi A3 Sportback
g-tron drives the considerable distance of
400 km at a remarkably low consumption of
3.2–3.3 kg CNG/100 km. One kilogram of natural
gas contains as much energy as 1.5 litres of petrol.
During combustion CO₂ emissions are 25–30%
less than with petrol. There is no perceptible
impairment of acceleration and dynamics. The
Audi A3 Sportback g-tron achieves an overall range
of around 1,300 km, which corresponds to the
distance between Berlin and Le Mans, or
Copenhagen and Berne.
The efficiency and long range of the Audi
A3 Sportback g-tron are thoroughly impressive.
Yet Audi is pressing ahead even further and has
set yet another milestone on the road to
consistent CO₂ reduced mobility with the Audi
e-gas project. Audi e-gas is produced exclusively
through the use of regenerative resources. Wind
energy is used to produce hydrogen through
electrolysis; this then reacts with CO₂ during
methanation to produce Audi e-gas. The CO₂
used by the Audi e-gas system is the exhaust gas
from a biomethane plant operated with organic
waste. This means the fuel produced is almost
identical to fossil natural gas but is particularly
environmentally friendly since the only CO₂
released was bound during the production of
Audi e-gas, resulting in a closed cycle.
With this complete chain of effective CO₂
reducing measures – from the primary energy
source of the fuel through to highly efficient
vehicles – Audi demonstrates how exciting
sustainability and future mobility technologies
can be.
The fuel consumption and CO₂ emission figures as well as the efficiency classes can be found from page 122 onwards.
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