2018 Audi S8 Plus vs Audi RS7 – Acceleration
In this video you will watch 2018 Audi S8 Plus vs Audi RS7 – Acceleration
2016Audi RS7 Stage II
APR is pleased to present the ultimate engine control unit (ECU) upgrade for the 4.0 TFSI engine!
APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 4.0T engine. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR’s optimization of the factory engine management system to take full advantage of the engine’s capabilities, without needing any end user adjustment. The software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install.
APR ECU Upgrade Stages
APR’s ECU Upgrades are available in multiple stages, supporting various octanes both with or without any hardware modifications. All stages are fully compatible with an upgraded intake, cooling system, catback exhaust, or other minor bolt on modifications. APR Stage II software is available for a high flow Race DP exhaust system.
The APR Stage II ECU Upgrade requires a high flow Race DP exhaust system and is available with 679-761 HP and 703-793 FT-LBS torque, depending on octane. Gains as high as +122-203 HP and +181-273 FT-LBS of torque are available throughout the power band! This software must be used with a high flow Race DP exhaust system.
Audi S8 Plus
The 4.0-litre V8 uses two twin-scroll turbochargers mounted in the vee of the cylinder bank to improve responses, and combines its peak 512bhp with a very solid 479bhp of torque – with this peak available all the way from 1700rpm and 5500rpm. Drive is supplied via an eight-speed automatic gearbox, plus Audi’s new ‘sport differential’, intended to sharpen cornering response by vectoring torque to the outside rear wheel. The S8 rides on air springs, with all versions getting three-stage variable damping.
The fuel-saving tech is likely to get most headlines, although in truth it’s a relatively small part of the S8’s box of tricks. Under light use when coasting the engine automatically deactivates cylinders 2, 3, 5 and 8 – this can only happen when the engine is producing less than 185lb ft, the car is in third gear or higher and the engine is turning at between 1000 and 3500rpm. When the conditions are met, lobes on the camshaft slide to engage ‘zero lift’ lobes next to the cylinders to be deactivated. The system can then fire up the idle cylinders on demand, in just 0.3 seconds.
What’s it like to drive?
The cylinder deactivation system is something that most drivers will barely notice. Not only is the switch between eight and four cylinders effectively invisible, the only indication is a small message on the dashboard display, but in real world driving you’re only likely to experience it under very gentle use – anything more than very gentle pressure on the throttle pedal is enough to turn the V4 back into a V8.
It’s certainly quick. The new engine lacks the high-revving drama of the old V10 – peak power arrives at just 5800rpm and the engine revs out barely past the ‘6’ mark on the tacho. But the combination of instantaneous torque and the autobox’s clever brain makes for some spectacular blue touchpaper moments. Acceleration is relentless and seemingly linear – barely abating as speeds turn from silly to outright daft. Like the standard A8, the cabin is extremely well insulated and – in any of the three suspension modes – the ride is comfortable and body control good. In short, the S8 looks set to be a brilliant high-speed cruiser
Specifications
ENGINE TYPE: twin-turbocharged and intercooled DOHC 32-valve V-8, aluminum block and heads, direct fuel injection
DISPLACEMENT: 244 cu in, 3993 cc
POWER: 605 hp @ 6800 rpm
TORQUE: 553 lb-ft @ 2500 rpm
TRANSMISSION: 8-speed automatic with manual shifting mode
BASE PRICE: $116,850
Top speed (mfr’s claim): 190 mph
Braking, 70-0 mph: 156 ft
Roadholding, 300-ft-dia skidpad: 0.89 g
FUEL ECONOMY:EPA city/highway driving: 15/24 mpg
VIDEO
Video by :Mx Fn via youtube
Car information by : Evo.co.uk , topspeed.com