B9 Audi A4 to get new “Miller cycle” 2.0 TFSI engine

Audi has announced a new 2.0 litre TFSI engine at this year’s Vienna Motor Symposium. The new 1,984 cc engine will make its debut in the all-new B9 Audi A4 by the end of 2015.

Output is rated at 190 horsepower and 320 Nm of torque available from as low as 1,450-4,400 rpm. In the new A4, the engine is claimed to have an NEDC cycle fuel consumption of less than 5 litres per 100 km. Audi says the new 2.0 TFSI engine will be the most fuel efficient in its class. As a comparison, the 2.0 litre engine in the BMW 320i is rated at 6 litres per 100 km on the NEDC cycle.

The secret to the engine’s fuel efficiency is a new combustion method. Audi likens it to a further developed version of a Miller cycle. What they’ve done is reduce intake time – the engine uses a 140 degree crank angle rather than a 190 to 200 degree one. For higher loads, the Audi Valvelift System allows a longer load time at 170 degree crank angle.

Thanks to a higher boost pressure on the inlet side, the engine attains optimal cylinder charges despite the shorter intake time. The intake valve also closes earlier before the bottom dead centre is reached. This lowers the medium pressure, allowing a high, efficiency-boosting compression ratio.

An additional injection upstream from the intake valve yields an efficient mixture formation that is already complemented by the direct injection in the intake manifold and in the combustion chamber.

Other features include a controlled coolant flow to shorten engine warm-up time, an integrated exhaust manifold, and a low friction 0W20 engine oil. The engine itself is also light, weighing about 140 kg.

audi-20-tfsi-audi-a4

GALLERY: Audi A4 B9 render/spyshots

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Paul Tan

After dabbling for years in the IT industry, Paul Tan initially began this site as a general blog covering various topics of personal interest. With an increasing number of readers paying rapt attention to the motoring stories, one thing led to another and the rest, as they say, is history.

 

Comments

  • policeman on May 07, 2015 at 6:23 pm

    Why want to buy a German and look for a tiny save in petrol?

    Like or Dislike: Thumb up 10 Thumb down 11
    • Ofcourse for the comfort and brand power. Ada duit pon kedekut ma..mesti mau jimat

      Like or Dislike: Thumb up 13 Thumb down 5
    • tokmoh. on May 07, 2015 at 9:23 pm

      Emission, bro, emission. Europe wants less emission.

      Like or Dislike: Thumb up 5 Thumb down 1
      • audifails on May 07, 2015 at 11:22 pm

        Less emission of course when it stays in SC much longer than moving on roads

        Like or Dislike: Thumb up 2 Thumb down 0
      • You want emission, get a Camry Hybrid.

        Like or Dislike: Thumb up 1 Thumb down 3
        • convec on May 08, 2015 at 8:52 am

          No, coz crampy boot

          Like or Dislike: Thumb up 0 Thumb down 0
        • Toyota 2.5L Atkinson
          Power: 160PS @ 5,700 rpm
          Torque: 213Nm @ 4,500 rpm

          Audi 2.0L Miller
          Power: 190HP
          Torque: 320Nm @ 1,450 rpm

          Like or Dislike: Thumb up 6 Thumb down 2
  • VW_rocks on May 07, 2015 at 6:26 pm

    Can’t wait to see the real car already… (tempting)

    Like or Dislike: Thumb up 7 Thumb down 1
  • junkie on May 07, 2015 at 11:17 pm

    will this engine “konk” in our beloved country due to weather and ron95?

    Like or Dislike: Thumb up 2 Thumb down 4
  • seancorr (Member) on May 08, 2015 at 2:08 am

    This will be interesting since Mercedes has unveiled their all new W205 and BMW has their F30 LCI launched today and finally we will be seeing Audi’s answer to its rivals.

    Like or Dislike: Thumb up 4 Thumb down 0
  • tahanke on May 08, 2015 at 8:37 am

    Good in terms of innovation but please make sure its reliable! A modest saving in fuel means nothing if we have to put up with cost of car breakdowns and undue stress!

    Like or Dislike: Thumb up 3 Thumb down 1
  • blaster88 on May 09, 2015 at 12:10 pm

    Torque figures are respectable but 190 hp for a next next gen powerplant…believe the figures are conservative….

    Like or Dislike: Thumb up 0 Thumb down 0
 

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