Audi A5 2.0 TFSI CNG Natural Gas Vehicle

Audi unveiled a CNG-powered A5 coupe last year called the Audi A5 2.0 T-CNG, powered by a 2.0 litre TFSI CNG engine which can run on both normal petrol and Compressed Natural Gas, which is what our NGV vehicles in Malaysia run on.

The Audi A5 2.0 TFSI CNG is designed to provide similiar power and torque outputs as the base A5 1.8 TFSI model. It can produce 170 PS, similiar to the 1.8 TFSI model’s 170 PS figure. This 2.0 litre engine can produce the same power figures running on both petrol and natural gas. It is said to be an enlarged version of the 1.8 TFSI engine rather than using the 2.0 TFSI in the Golf GTI.

CNG is stored in four pressure tanks with a total volume of 130 litres, which according to Audi is able to store 21kg of CNG. This allows a total mileage of 420km from the CNG alone. The conventional petrol tank has been reduced to a mere 14 litres, which Audi says is good for 180km.

The engine’s ECU is modified to support CNG operation, with new features and functions to support controlling the CNG injectors as well as facilitating a smooth changeover between CNG and petrol. The coating of the catalytic converter is modified to take into account the different exhaust gas composition.

The direct injection feature of the engine allows the air-CNG mixture to be compressed up to a high 12:1 compression ratio, which allows the engine to extract much more power out of similiar amounts of CNG compared to what non-direct injection CNG engines can do, which have to run at lower compression to prevent engine knocking when petrol is being used as fuel. This is because CNG is naturally knock-resistant.

Looking to sell your car? Sell it with Carro.

10% discount when you renew your car insurance

Compare prices between different insurer providers and use the promo code 'PAULTAN10' when you make your payment to save the most on your car insurance renewal compared to other competing services.

Car Insurance

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

  • familyman (Member) on Jun 15, 2008 at 10:40 pm

    hmmm imagine an affordable audi with this engine… and then have to queue up behind taxis at petronas for gas (literally gas, not gasoline)

    but seriously.. if this becomes commerciallized i still wouldn’t be able to afford an audi, err can you have turbo with gas though?

    Like or Dislike: Thumb up 0 Thumb down 0
  • F430CS (Member) on Jun 15, 2008 at 10:54 pm

    This is a turbocharged engine. It’s already a turbocharged gas-powered engine, but able to make transition with petrol.

    Like or Dislike: Thumb up 0 Thumb down 0
  • cibengism (Member) on Jun 16, 2008 at 12:22 am

    right car at the right time. too bad not the right price for us.

    Like or Dislike: Thumb up 0 Thumb down 0
  • csv (Member) on Jun 16, 2008 at 12:24 am

    Audi A5, the car driven by Agent 47 in Hitman.

    nice coupe. nice brand. nice engine.

    euromobil doesn’t bring this in, and if they do, i expect the price to be 400k plus.

    Like or Dislike: Thumb up 0 Thumb down 0
  • osh_kosh (Member) on Jun 16, 2008 at 12:51 am

    its 14liters petrol tank not really suitable here… with the current NG stations available, this car surely can’t be a ‘balik kampung’ sort of car. From KL i think no problem to reach East cost such as Kelantan on CNG alone… but if going back to KL, imagine how many time to stop for petrol with a 14liters tank.. i don’t think Kelantan have NG station yet, is it?

    but, no problem using in big city if u can afford one.. hehehe.. with 420km mileage using CNG alone I’m sure u will not trap in the long queue with all those taxis much too often

    Like or Dislike: Thumb up 0 Thumb down 0
  • ahmadmckk (Member) on Jun 16, 2008 at 1:13 am

    the petrol tank is too shallow, but the 180km range is not bad.

    Audi A5 is a two-door coupe, so it would be difficult at the back seat.

    excellent engine. hope more carmakers do the exact thing soon.

    Like or Dislike: Thumb up 0 Thumb down 0
  • azrai (Member) on Jun 16, 2008 at 7:24 am

    How about our local scene? There’s nothing sort of R&D here.

    Like or Dislike: Thumb up 0 Thumb down 0
  • familyman (Member) on Jun 16, 2008 at 9:36 am

    wah lau eh! how can i not see the intercooler!! must be partially blind last nite.. :P

    huhu turbocharged gas engine ehhh amazing!!

    Like or Dislike: Thumb up 0 Thumb down 0
  • jolly_idiot (Member) on Jun 16, 2008 at 10:50 am

    I’m more interested to it’s tank. Pretty big storage compare to our NGV tank which can go only 200+km. WIll it sacrifice boot space for the tank again for audi?

    Like or Dislike: Thumb up 0 Thumb down 0
  • mokkf82 (Member) on Jun 16, 2008 at 7:11 pm

    Guys! petrol is just an option when there’s not NGV station to refill back. This car engine is not make for petrol running anyway. But imagine if G really go on to the NGV segment on private cars and not only commersial vehicle, there will be alot more of NGV station than a petrol ones.
    It’s just matter whether G is willing to pay that risk of sacrifices on Protons or Perodua.
    Unless there’s a massive change in these two local company heading into NGV, then we will be having this benifit.

    Like or Dislike: Thumb up 0 Thumb down 0
  • rexis (Member) on Jun 17, 2008 at 4:48 pm

    With four CNG tanks and 130 litres, it is most likely the tanks are hidden beneath the floor of the vehicle, means its four thin and long one rather then a one big and fat one that clog up ur boot space.

    Like or Dislike: Thumb up 0 Thumb down 0
  • ainil on Nov 23, 2009 at 8:39 am

    there is r&d locally, go to UM engineering, usually there's a cng-di car parked outside manufacturing workshop.

    Like or Dislike: Thumb up 0 Thumb down 0
  • VERGIS MATHEWS on Oct 20, 2012 at 6:23 am

    a beauty. A5 CNG version, is this a monfuel or bi fuel. in regard to the CNG steel or composite. Is there a 2012 version. Is there a after sales support.

    Like or Dislike: Thumb up 0 Thumb down 0
 

Add a comment

required

required