Audi A6 Avant 40 TDI 2018: 60.1Mpg Efficiency, 565L Boot

The 2018 Audi A6 Avant 40 TDI redefines what a premium estate car can achieve, blending cutting-edge mild-hybrid technology with limo-like refinement and family-friendly practicality. This model, powered by a 2.0-liter diesel engine producing 201 horsepower and 295 lb-ft of torque, prioritizes smooth performance and efficiency over outright speed, making it an ideal choice for long-distance commuters and company car drivers.

Powertrain and Performance: Efficiency Meets Refinement

At the heart of the A6 Avant 40 TDI lies a sophisticated 2.0-liter turbocharged diesel engine augmented by a mild-hybrid system. This setup delivers 201bhp and 400Nm of torque, propelling the car from 0-62mph in 8.3 seconds and on to a top speed of 149mph. The mild-hybrid technology, standard across the range, uses a 12V battery and belt-driven starter-generator to assist during acceleration and enable coasting with the engine off, contributing to official fuel economy figures of 60.1mpg and CO2 emissions of 124g/km—translating to a 29% Benefit in Kind tax rate for business users.

Real-world testing confirms strong efficiency, with drivers achieving around 50mpg on mixed routes and up to 50.4mpg over extended motorway runs. The seven-speed S tronic dual-clutch automatic transmission shifts seamlessly, keeping the engine in its optimal rev range for responsive yet hushed performance. Compared to the pricier 50 TDI V6 (284bhp), the 40 TDI feels smoother and more isolated from the cabin, avoiding the torque-converter sluggishness noted in the larger unit.

This table highlights why the 40 TDI often emerges as the range’s value champion, offering ample performance for everyday needs without the V6’s premium.

Driving Dynamics: Balanced Agility in a Large Estate

Despite its front-wheel-drive layout and 1,975kg kerb weight, the A6 Avant 40 TDI surprises with nimble handling. The lighter four-cylinder setup enhances responsiveness over the heavier V6 models, while precise steering provides accurate feedback. It corners with confidence on wet or dry roads, exhibiting minimal body roll thanks to a well-tuned suspension that balances comfort and control.

Motorway manners shine brightest: the cabin remains serene at high speeds, with low wind and tire noise. The mild-hybrid aids in smooth restarts after coasting, and the transmission’s quick shifts ensure effortless overtaking. While not as engaging as the BMW 5 Series Touring, it prioritizes relaxation over sportiness, proving ideal for cyclists or families hauling gear. In snow, front-drive models maintain surprising grip, as noted in long-term tests.

Interior Design and Comfort: Luxury Redefined

Step inside, and the A6 Avant’s cabin impresses with its premium materials and high-tech layout. The dashboard features dual touchscreens for the MMI infotainment system, offering intuitive control over navigation, climate, and virtual cockpit displays. Seats are supportive with ample adjustment, providing limo-like space for front occupants and generous headroom/legroom for three rear passengers.

• Front seating: Electrically adjustable, heated, with excellent lumbar support for long drives.
• Rear space: Knee room for adults, ISOFIX points, and wide doors for easy access.
• Build quality: Soft-touch surfaces, Alcantara options, and brushed aluminum trim elevate the feel.

Long-term users praise its suitability for hobbies like cycling, thanks to the flat-folding seats and versatile load area.

Practicality and Load Capacity: Estate Versatility

As an Avant estate, practicality is key. The boot offers 565 liters with seats up (expandable to 1,680 liters folded), complete with rails, nets, and a 12V outlet. A hands-free tailgate and underfloor storage add convenience. While rivals like the BMW 5 Series may edge it in sheer volume, the A6’s shape maximizes usability for bikes, luggage, or groceries.

Cabin storage includes deep door bins, a cooled console, and adjustable rear air vents, making it family-ready.

Technology and Safety Features

Audi loads the A6 with innovation: adaptive cruise control, lane-keeping assist, and traffic jam assist feature in higher trims. The virtual cockpit projects key info on a 12.3-inch screen, while matrix LED headlights enhance night driving. The mild-hybrid supports stop-start efficiency without lag.

Running Costs and Ownership

Pricing starts competitively, with the 40 TDI undercutting the 50 TDI by £9,000 spec-for-spec. Residual values hold strong, and service intervals suit high-mileage users. Long-term tests report reliable 47-50mpg averages, low running costs, and minimal issues.

Pros and Cons at a Glance

• Pros: Exceptional refinement, top fuel economy, spacious and tech-rich interior, smooth gearbox.
• Cons: Less boot space than some rivals, not the most dynamic drive, higher trims add cost.

Who Should Buy the Audi A6 Avant 40 TDI?

Perfect for executives, families, or motorway warriors seeking luxury without excess. It outshines in comfort and efficiency, though enthusiasts may prefer BMW’s flair.

Frequently Asked Questions (FAQs)

What is the fuel economy of the Audi A6 Avant 40 TDI?

Official figures claim 60.1mpg, with real-world around 50mpg on mixed driving.

Is the 40 TDI faster than the 50 TDI?

No, the 50 TDI accelerates quicker (5.3s vs 8.3s), but the 40 TDI is smoother and cheaper.

How practical is the boot space?

565-1,680 liters, with useful features like load rails and underfloor storage.

Does it have four-wheel drive?

The 40 TDI is front-wheel drive; quattro is optional on higher models.

What warranty does it come with?

Standard 3-year/60,000-mile Audi warranty, extendable.