Audi has announced that they will be updating the engines for the Sportier versions of their full-size SUVs, the SQ7 and the SQ8 to the new 4.0L TFSI V8, following in the footsteps of other automakers which have been putting sporty engines in their high-performance SUVs. The new engine gives 373Kw (507PS) of power and 567pound feet of torque. The powerful engines is able to propel the heavy cars from 0-100 in 4.1 seconds, and as it stands it is safe to say that the engine is no slouch. At full chat the engine powers the cars to an electronically limited 250 kmph.
The 4.0L TFSI engine has been carefully crafted using smart implementation of modern technology. The lightweight aluminium engine block houses cylinder barrels that are covered with plasma sprayed iron, which acts to reduce the friction in the cylinders and reduce engine wear and optimize fuel consumption. Further steps to improve fuel consumption include a Cylinder on Demand feature (COD) which deactivates four cylinders when the car is being driven in moderate conditions, highway for example to save fuel.
The engine is also able to regulate the intake and exhaust camshafts by an angle of up to 50 degrees, this precision in control of the valve overlap makes sure that the gas exchange and combustion chamber filling are adjusted between how the car is driven and can be done at a moments notice if the driver puts his foot down to unleash the full potential of the engine.
The Twin-scroll turbocharger, two of which are fitted, can provide each cylinder bank (four cylinders) with 1.5 bar of relative pressure without any loss in gas exchange. The is virtually zero turbo lag which is apparent from the engine’s spontaneous response. The engine note is sportier on account of the cylinder ignition sequence, 1-3-7-2-6-5-4-8, which is further amplified with the louder exhaust system. The engine is mounted on active vibration dampeners which reduce vehicle vibrations and keep the cabin comfortable and quiet. Electromagnetic actuators fitted inside these dampeners emit vibrations corresponding to the engine but opposite(180-degree), and the waves cancel each other out leading to lower vibrations.
A swift 8-speed automatic transmission which diverts power to the four wheels via the Quattro system helps in the engine spinning the wheels with speed and agility. The mechanical differential distributes power at a ratio of 40:60 to the front and rear axles under normal driving, and incase of loss of traction in either of the axles, power can be diverted up to 70% to the front and 85% to the rear.
The new engine is sure to make the sporty German SUVs faster and better on a muddy track, fitted with an array of features like sport suspension, sport differential, torque vectoring, rear wheel steering, electronic chassis(operates with selection of driving modes), optional carbon ceramic brakes and S-line sport design cues.
The new SQ7 and SQ8 with the 4.0L TFSI V8 are expected to hit the market before winter this year. In Germany, they will be available from EUR 93,287.40 and EUR 101,085.72, respectively.
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