The next-generation Audi A4 will debut a new 2.0 litre turbocharged petrol engine for the brand, a 140kw/320Nm unit capable of consuming less than 5.0 l/100km on the combined cycle.
Billed by Audi as the most efficient engine in its class, the new 2.0 TFSI uses a unique combustion cycle to help it reduce fuel burn and lower emissions.
Audi's system sees the inlet valve being opened earlier and for a shorter period than usual, while higher boost pressure fills the cylinder with fuel and air at a faster rate.
Lightweight construction methods also keep the engine's weight to a svelte 140kg, and an on-demand coolant pump reduces parasitic losses on the engine.
The new engine also combines port injection with direct injection, as well as a high compression ratio for increased efficiency. The result of all this is a peak torque output that's spread between 1450 to 4400rpm, giving the 2.0 TFSI diesel-like tractability.
The downside is less power density. The current 2.0 TFSI engine in the A4 makes 155kW and 350Nm, the latter of which is spread between 1500rpm and 4200rpm - only slightly narrower than the new engine's torque band.
Then again, with a combined fuel economy of 6.8 l/100km, the current engine is at least 1.8 l/100km thirstier. It's not clear whether a higher-output version of the new 2.0 TFSI engine will be offered.
The all-new Audi A4 range is slated to make its debut towards the end of this year, with local sales likely to commence in the first half of 2016.
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