While many carmakers race toward full electrification, Audi is proving diesel isn’t done yet, at least overseas. The brand has debuted a new-generation 3.0-litre V6 TDI mild-hybrid powertrain for the Q5 and A6, featuring electric boost technology to eliminate turbo lag and slash emissions.
The engine is now available in Europe, but Australian timing remains unconfirmed. With strong local demand for diesel SUVs and high-torque long-distance tourers, the upgraded V6 TDI could become a key drawcard for buyers here if it lands.
Why does it matter for Aussie buyers?
Australia remains one of the few major markets where diesel power is still highly valued, especially for:
- Long regional commutes
- High-speed highway travel
- Towing and touring
- Low fuel consumption over long distances
The current Audi Q5 50 TDI and Audi A6 50 TDI are already popular Audis among diesel loyalists in Australia, and an upgraded driveline with instant electric torque and improved fuel savings would likely broaden appeal, particularly among buyers hesitant to move to petrol-hybrids or EVs.
Electrified diesel, without losing the diesel character
The new powerplant is the latest evolution of the Volkswagen Group’s long-running EA897 V6. Audi has retained the muscular diesel character while integrating:
- Belt alternator starter
- Powertrain generator
- Electrically powered compressor (EPC)- the standout addition
Together, the electrified components provide up to 18 kW (24 PS) of extra power and 230 Nm in instant electrical torque. The setup supports partial electric operation at low speeds and during manoeuvres, cutting fuel use and emissions.
The EPC spins at 90,000 rpm in 250 milliseconds, building boost pressure around one second faster than before. Audi claims:
- Zero perceptible turbo lag
- Much quicker take-off
- A full car length gained in the first 2.5 seconds vs the outgoing V6
Mid-range acceleration is said to “closely resemble the feel of an electric drivetrain”, meaning strong overtaking performance on highways, a major advantage for Australian touring.
No turbo lag, and quicker than the previous V6 engines
The new electrically powered compressor plays a central role in Audi’s performance claims. Linked to the 48-volt system, it spins up at up to 90,000 rpm in 250 milliseconds, rapidly boosting intake pressure before the turbocharger reaches full flow.
The results, according to Audi:
- Boost builds 1 second faster
- No perceptible turbo lag
- A full car length gained in the first 2.5 seconds vs the previous V6 TDI
- Mid-range acceleration “similar to an electric powertrain”
Improved airflow and a wider operating range mean the EPC now assists across the entire rev band, unlike earlier EPC-equipped Audis such as the S4, S6 and SQ5, which relied on it only in a narrow window.
Refined and efficient, without sacrificing performance
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Despite the leap in responsiveness, efficiency is a major headline. The diesel is compatible with HVO 100 (hydrotreated vegetable oil) fuel, which can cut CO₂ emissions by up to 95% depending on the source material. Audi even fills Q5 and A6 models, leaving its Ingolstadt and Neckarsulm factories with HVO already in the tank.
The brand claims the combination of a quicker boost pressure buildup, reduced reliance on the turbo for initial response, and regenerative braking allows up to 25 kW of energy recovery. All of these result in lower real-world fuel consumption than the outgoing V6.
Underpinned by quattro
As standard, the new V6 drives through Audi’s quattro all-wheel-drive system, complementing the torque-rich diesel and making the powertrain well-suited to both long-distance touring and high-load towing applications.
So, will Australia get it?
We don’t know yet! With Australia’s continued appetite for diesel SUVs and high-performance grand tourers, and the fact that both Q5 and A6 diesel variants consistently sell here, an eventual rollout is highly likely rather than speculative.
The most significant deciding factors will be:
- Fuel specs, especially widespread availability of HVO or equivalent
- Emissions regulations, as Australia adopts more European-style standards
- Supply priorities, given that Europe is first in line.
Bottom line
If the new V6 TDI lands in Australia, expect it to become the most compelling diesel option Audi has launched locally in years, offering diesel efficiency, electric-style throttle response, stronger performance for towing and long-distance driving and lower emissions potential.
Until Australian launch details are confirmed, this upgraded V6 remains one to watch, especially for buyers who want diesel without compromise.
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