i think this beat your BMW and Mercedes... gotta say
In the last quarter of 2005, Audi previewed the latest
Typ 4E
S8 5.2 FSI quattro, based on its
Volkswagen Group D3 platform stablemate, the
Audi A8. Factory production commenced June 2006.
Audi's factory performance claims for the V10 S8 indicate a 0-100
kilometres per hour (62.1
mph) time of 5.1 seconds whilst consuming "SuperPlus" / "EuroSuper" 98
RON unleaded
petrol. This places the S8 in a competitive range with the
Mercedes-Benz S63 AMG and S600 (powered by a twin-turbo V12), the
BMW 760Li (powered by a naturally-aspirated 12-cylinder engine), and the company's own A8L
W12. Top speed is electronically limited to 250 km/h (160 mph).
[
edit] Powertrain
Motive power in this latest S8
powertrain features an all
aluminium alloy 5,204
cc (317.6
cu in)
Fuel Stratified Injection (FSI)
40-valve (four valves per cylinder) 90°
V10 petrol engine (parts code: 07L, identification code: BSM), derived from the
Lamborghini Gallardo 5.0 litre V10. A longer
stroke and wider
bore increases the
displacement of the engine, and produces more
torque
at lower revs, making it more suitable for the larger and heavier Audi
luxury executive passenger car. It has been retuned to produce 331
kilowatts (450
PS; 444
bhp) at 7,000 rpm, and 540
newton metres (400
ft·lbf) of torque at 3,500 rpm. It utilises twin chain-driven
double overhead camshafts (DOHC), and
variable valve timing for both intake and exhaust valves. Engine management is by way of
Bosch Motronic MED 9.1
engine control unit, which controls the mapped direct ignition, ten individual spark coils,
common rail cylinder-direct sequential mulit-point
fuel injection, and
drive by wire throttle.
This same engine is also used in the latest
Audi S6 (D6), but in a slightly lower state of tune where it develops 320 kW (435 PS; 429 bhp).
A sports-optimised
ZF 6HP26 six-speed
tiptronic automatic transmission (parts code: 09E, identification codes: KLW or KZK) (
gear ratios
- 1st: 4.171, 2nd: 2.340, 3rd: 1.521, 4th: 1.143, 5th: 0.867, 6th:
0.691) with "Dynamic Shift Programme" (DSP) and "sport" mode, with
steering wheel mounted paddle-shifters, is the only offering. Output is transmitted via Audi's trademark
quattro permanent
four-wheel drive system, initially using the
Torsen T-2 50:50 dynamic centre
differential, and from 2008
model year, utilising the latest Torsen T-3 asymmetric dynamic centre
differential, with a 'default' torque distribution of 40% to the front
axle
and 60% to the rear. Final drive ratio is 4.055, and traction is
assisted with Audi's "Electronic Differential Lock" (EDL) and
"Anti-Slip Regulation" (ASR) (commonly known as
traction control system) - both functions of the
Bosch ESP 5.7 (or the later ESP 8.0)
Electronic Stability Programme.
[
edit] Suspension, steering, brakes, tyres
The S8, like its related A8, utilises a multi-link
suspension
layout front and rear, with pressurised air springs. However, for the
S8, the effective spring and damper rates are noticeably firmer, along
with re-engineered suspension mounts. "
servotronic" speed-dependent power assisted rack and pinion
steering point the S8 in the desired trajectory.
The
brake system consists of radially ventilated
discs all round, the fronts sized at 385
millimetres (15.2
in)
in diameter by 36 mm (1.42 in) thick, and the rears at 335 mm (13.2 in)
by 22 mm (0.87 in). The discs are clamped with black painted
dual-piston calipers up front, and a single-piston sliding caliper at
the rear, coupled to an electro-mechanical parking brake. A
Bosch ESP 5.7 (later upgraded to ESP 8.0)
Electronic Stability Programme, with
Anti-lock Braking System (ABS),
Brake Assist, and
Electronic Brakeforce Distribution (EBD) complete the brake system.
Optional "Audi ceramic"
Carbon fibre-reinforced Silicon Carbide
(C/SiC) composite front and rear brakes are available, which use 380 mm
(14.96 in) diameter by 38 mm (1.496 in) thick drilled, vented, and
floating
SGL Carbon discs, with grey painted six-piston fixed
Brembo monobloc alloy calipers with the "Audi ceramic" logo up front, and 356 mm (14.02 in) by 28 mm (1.102 in) discs at the rear.
Standard
alloy wheels consist of 9Jx20" cast aluminium alloy "S design", shod with either 265/35ZR20 99Y XL performance
tyres (either
Bridgestone Potenza RE050A, or
Yokohama Advan Sport), or 275/35ZR20 102Y XL (
Continental SportContact2,
Dunlop SP SportMaxx, or
Pirelli P-Zero Nero). A direct-acting
tyre pressure monitoring system (TPMS) is also standard.