2011 AUDI S8 width

252 Tir es and whe els
Driving with different tires reduces vehi­
cle handling and can lead to a loss of
control.
- If the spare tire is not the same as the
tires that are mounted on the veh icle -
for example with winter tires - only use
the spare tire for a short period of time
and dr ive with extra care . Refit the nor­
ma l road wheel as soon as safely possi­
ble.
- Never drive faster than the maximum
speed for which the tires on your veh icle
are rated because ti res that a re driven
faster than their rated speed can fail
sudden ly .
- Overloading t ires cause heat build- up,
sudden tire failure, including a blowout
and sudden deflation and loss of control.
- T emperature grades app ly to tires that
are properly inflated and not over o r un ­
derinflated .
- For technical reasons it is not a lways
possible to use wheels from other vehi­
cles -in some cases not even whee ls
from the same vehicle model.
- If you install wheel trim discs on the ve­
hicle whee ls, make sure that the air f low
to the brakes is not blocked. Reduced air­
flow to the brakes can them to overheat, increasing stopping distances and caus­
ing a collision .
- Run flat t ires may only be used on vehi­
cles that were equipped with them at the
factory . The vehicle must have a chassis
designed for run flat tires . Incorrect use
of run flat tires can lead to vehicle dam­
age or acc idents. Check with an a uthor­
ized Audi dea le r or tire specialist to see if
yo ur vehicle can be equipped with run
flat tires. If run f lat tires are used, they
must be insta lled on all four wheels. Mix­
ing t ire types is not permitted .
- Fo r technical reasons , it is not genera lly
possib le to use the whee l rims from oth­
er vehicles. This can ho ld true for wheels
of the same veh icle type. - If the spare tire is different from the
tires that yo u have mounted on your ve­
hicle (for example winter tires or wide
profile tires), then use the spare tire for a
short period of time only and drive w ith
extra care. Replace the flat tire w ith the
tire matching the others on your vehicle
as soon as possib le .
- Never drive without the valve stern cap .
The valves cou ld get damaged .
@) For the sake of the environment
Dispose of o ld tires in accordance with the
local requirements .
Uniform tire quality grading
-Tread wear
- Traction AA AB C
- Tempe ra tu re ABC
Quality grades can be found whe re applicab le
on the tire sid e wall betw een tr ead shou ld er
a nd maximum section width
c> page 249,
fig. 188 .
For ex ample: Tread wear 200 , Tract ion AA ,
Temperatur e A.
All passenger car t ires must conform to Feder­
al Safety Requirements in add ition to these
grades.
Tread wear
T he tread wear grade is a comparative rating
based on the wear rate of the t ire when tes ted
u nder contro lled cond itions on a specified
government test course .
For example, a tire graded 150 would wear
one and one ha lf (11/2) times as well on the
government course as a tire graded 100.
T he relative performance of tires depends
upon the actual conditions of thei r use, how­
ever, and may depa rt s ignificantly from the
norm due to va riations in driving hab its, se rv­
ice practices and differences in road character -
istics and cl imat e. ..,.

chains because t he vehicle will be ex­
tremely low. If you do drive with snow
chains on while the vehicle is at this lev­
el, the snow chains might severe ly dam­
age the wheelhouse and other parts of
the veh icle.
@ Tips
Where snow cha ins are mandatory oncer­
tain roads, this normally also applies to ve­
hicles with All Wheel Drive.
Wheel bolts
Wheel bolts must always be tightened to the
correct torque .
The design of whee l bolts is matched to the
factory installed r ims. If different rims are fit­
ted, the correct wheel bolts with the right length and correctly shaped bolt heads must
be used . This ensures that wheels are fitted
secure ly and that the brake system f unctions
correctly .
In certain circumstances, you may not use
wheel bolts from a d iffe rent vehicle -even if it
i s the same mode l
¢page 285.
A WARNING
Imprope rly tig hte ned or maintained whee l
bolts can be come loose causing loss of
contro l, a co llision and serious persona l in­
jury .
- Alw ays keep the w heel bolts and the
th reads in the wheel hubs clea n so the
wheel bolts can turn easily and be prop­
er ly tightened .
- Never grease or oil the wheel bo lts and
the threads in the w heel h ubs. They can
become loose wh ile driving if greased or
o iled, even if tightened to the specif ied
torque.
- Only use wheel bolts that belong to the
rim being installed.
- Never use different whee ls bolts on your
vehicle.
- Always maintai n the co rrect tightening
torq ue for the wheel bo lts to reduce the
Tire s an d wheel s 255
risk of a wheel loss. If the tightening tor­
que of t he wheel bolts is too low, they
can loosen and come out when the vehi­
cle is mov ing. If the tighte ning torque is
too h igh, the wheel bol ts and threads
can be damaged and the whee l can be­
come loose.
(I) Note
The specified torque for the whee l bolts is
90 ft lb ( 120 Nm) wi th a tole rance of± 7,4
ft lb(± 10 Nm). Torq ue whee l bolts diago­
nally. Afte r cha nging a whee l, the torq ue
must be checked as soon as possible wi th a
torque w rench -prefe rably by an au thor­
ized Audi dealer or qualif ied workshop .
Low aspect ratio tires
Your Audi is facto ry-eq uipped with low aspect
ratio tires. These tires have been thoro ughly
tested and been se lected specifically for your
model for their superb performance, road fee l
and handling u nder a variety of driving cond i­
tions . Ask your authorized Audi dealer for
more details.
The low aspect ratio of these t ires is ind icated
by a numeral of
55 or less in the tire's size
designation . The numeral rep resents the ratio
of the t ire's sidewall height in relation to its
t read width ex pressed in pe rce ntage. Conven ­
tiona l tires have a he igh t/w idth ratio of 60 or
more.
The performance of low-aspe ct-ratio tire s is
particularly sensitiv e to improper infla tion
pres sure. It is therefore important that low
a spect ratio tires are inflated to the specified
pre ssure and that the inflation pressure i s
regularly checked and maintained. Tire pre s·
sures should be checked at least once a
month and always befo re a long trip
¢ page 244, Checking tire pressure.
What you can d o to avoid tire and rim
damage
Low aspect ratio tires can be damaged more
easily by impact w it h potholes , curbs, gul lies ..,.
•
•

282 Data
Data
372 hp, a-cylinder engine, with all wheel drive
Appl ies to vehicles: with 8-cy linder engine and a ll whee l drive
Engine data
Maximum output SAE net
Maximum torque SAE net
No . of cylinders
Displacement
Stroke
Bore
Compression ratio hp@rpm
l
b-ft@ rpm
CID (cm
3 )
in (mm)
i n (mm)
372 @6800
328@3500
8 cylinder
254.3 1 (4163)
3 .65 (92,8)
3.33 (84,5)
12.5: 1
Fuel Premium unleaded (91 AKI)
Recommended for maxi­
mum engine performance. Further details<=>
page 218,
Gasoline
Dimen sion s (appro x.)
Length (with license plate bracket)
Width (across mirrors)
He ight (unloaded) in (mm)
in (mm)
in (mm)
T urning circle diameter (curb to curb) ft . (m)
Capacities (approx.) Fuel tank
- Total capacity gal (liters)
- Reserve (of total capacity) gal (liters)
Windshield and headlight washer quarts (liters)
fluid container
Engine oil with filter change quarts (liters)
AS
202.24 (5137)
83.11 (2111)
57 .48 (1460)
4 0.35 (12.3)
ASL
207 .4 (5267)
83.1 1 (2111)
57 .9 (1471)
4 1.67 (12, 7)
23.8 (90 .0)
3 .17 (12)
5 .28 (5)
8 .14 (7.7)