Audi Q8 vs Mercedes GLE 450 Australia: The Ultimate Luxury SUV Comparison

Choosing between the Audi Q8 and Mercedes-Benz GLE 450 in Australia is not particularly easy. Both vehicles combine powerful six-cylinder engines, premium interiors, advanced technology and the kind of comfort we expect from luxury SUVs costing well over $140,000.

However, these German rivals approach luxury motoring differently.

The Audi Q8 focuses on sophisticated styling, confident handling, impressive towing capability and a refined driving experience. Meanwhile, the Mercedes-Benz GLE 450 emphasises effortless acceleration, high-end comfort, innovative technology and traditional Mercedes-Benz luxury.

There is also an important difference in the Australian market: the latest petrol-powered GLE 450 is offered in the sleek Coupé body style, making it a particularly relevant competitor to the coupe-inspired Audi Q8.

But which model makes more sense for Australian drivers?

In this comprehensive comparison, we'll explore their engines, performance, fuel economy, dimensions, interior technology, reliability, maintenance costs, towing abilities and overall value for money.

We'll also explain which SUV is better suited to city driving, long highway journeys and Australian family life.

Audi Q8 vs Mercedes GLE 450: Quick Comparison

For a meaningful comparison, we're focusing on the Australian-specification Audi Q8 TFSI quattro 250kW S line, previously known as the Q8 55 TFSI, and the updated Mercedes-Benz GLE 450 4MATIC Coupé.

The Mercedes figures relate to the updated MY27 model announced in 2026. Earlier GLE 450 models have slightly different specifications.

Prices are in Australian dollars, exclude on-road costs and refer to the specified models. Equipment, pricing and availability can change.

Our initial impressions are straightforward:

• Best acceleration: Mercedes-Benz GLE 450.
• Best official fuel economy: Audi Q8.
• Best maximum towing capacity: Audi Q8.
• Best for the latest infotainment technology: Mercedes-Benz GLE 450.
• Best for buyers prioritising purchase price: Audi Q8.
• Best for a sporty yet understated design: Audi Q8.

Despite these differences, both are exceptionally capable luxury SUVs. The best choice ultimately depends on how you intend to use your vehicle.

Audi Q8 vs Mercedes GLE 450: Engine and Performance

Both SUVs feature sophisticated 3.0-litre turbocharged petrol engines supported by mild-hybrid technology.

However, their engine configurations are quite different.

Audi Q8: Powerful V6 Engine

The Audi Q8 TFSI uses a 3.0-litre turbocharged V6 petrol engine delivering:

• Power: 250 kW
• Torque: 500 Nm
• Transmission: 8-speed Tiptronic automatic
• Acceleration: 0–100 km/h in 5.9 seconds
• Drivetrain: quattro all-wheel drive

This engine provides strong acceleration, impressive flexibility and excellent refinement.

One of its biggest advantages is how smoothly it delivers power.

Whether we're accelerating onto a motorway in Sydney, overtaking on a country road or travelling between Melbourne and Adelaide, the Q8 feels powerful without becoming unnecessarily aggressive.

The eight-speed automatic transmission also works particularly well with the engine's broad torque delivery.

Audi's quattro system provides reassuring traction, especially on wet roads or when travelling through Australia's mountainous regions.

Mercedes GLE 450: More Power and Torque

The updated Mercedes-Benz GLE 450 uses a 3.0-litre turbocharged inline-six petrol engine.

Its specifications include:

• Power: 280 kW
• Torque: 560 Nm
• Transmission: 9G-TRONIC nine-speed automatic
• Acceleration: 0–100 km/h in approximately 5.3 seconds
• Drivetrain: 4MATIC all-wheel drive

The Mercedes produces 30 kW more power and 60 Nm more torque than the Audi.

That advantage becomes particularly noticeable during acceleration.

The inline-six configuration is naturally well balanced, contributing to the engine's smooth operation.

Its nine-speed automatic transmission also helps maintain relaxed engine speeds during highway cruising.

Which SUV Has the Better Engine?

The Mercedes GLE 450 takes the lead when it comes to outright performance.

Its additional power, stronger torque output and quicker acceleration give it a measurable advantage.

However, the Audi Q8 is hardly slow.

In everyday Australian driving conditions, both engines offer substantially more performance than most drivers will ever need.

Winner: Mercedes-Benz GLE 450 for performance, although the Audi Q8 remains exceptionally capable.

Audi Q8 vs Mercedes GLE 450 Fuel Consumption Australia

Fuel efficiency is an important consideration, particularly for Australians who frequently drive long distances.

Neither vehicle is designed to deliver economy-car running costs, but there is a noticeable difference between them.

Official Fuel Economy Comparison

These figures relate to the Australian petrol Q8 and updated GLE 450 Coupé. Real-world fuel economy will depend on driving conditions, load, tyre selection and driving style.

Real-World Fuel Economy

The Audi Q8 generally has the advantage in official combined fuel consumption.

However, neither SUV will necessarily achieve its laboratory rating consistently.

Urban driving involving frequent traffic lights, short journeys and heavy congestion usually increases fuel consumption.

Highway driving can be considerably more efficient, particularly when maintaining consistent speeds.

Both vehicles also use 48-volt mild-hybrid systems that can support engine stop-start functions and improve efficiency.

Importantly, these are not conventional hybrids capable of substantial electric-only driving. They do not need external charging.

Annual Fuel Cost Comparison

Let's imagine driving 15,000 kilometres annually with premium petrol costing AUD $2.10 per litre.

Under this hypothetical scenario, the Audi saves approximately $315 annually in fuel expenses.

While that difference is not enormous compared with the vehicles' purchase prices, it becomes more relevant for high-mileage drivers.

Winner: Audi Q8 for official petrol fuel economy.

Exterior Design: Which Luxury SUV Looks Better?

Styling is subjective, but these SUVs have distinct visual personalities.

Audi Q8 Exterior Design

The Audi Q8 combines coupe-inspired styling with the proportions of a substantial luxury SUV.

Notable design features include:

• A prominent Singleframe front grille.
• Sharp LED lighting signatures.
• A low, sweeping roofline.
• Pronounced wheel arches.
• Sporty S line exterior detailing.
• A wide and muscular rear design.

One of the Q8's greatest strengths is its ability to look both sporty and sophisticated.

It makes a strong impression without necessarily appearing excessive.

Its styling also gives it a noticeably different personality from the more conventional Audi Q7.

Mercedes GLE 450 Exterior Design

The Mercedes GLE 450 Coupé offers a more expressive interpretation of the luxury SUV concept.

Its exterior highlights include:

• A distinctive Mercedes-Benz front grille.
• Revised lighting elements on the updated model.
• Flowing coupe-style roofline.
• AMG Line styling.
• Broad rear shoulders.
• Sporty alloy wheels.

The updated GLE also introduces a more contemporary front-end design.

Compared with the Q8, the Mercedes may appeal more to drivers who prefer a particularly prominent premium appearance.

Which SUV Looks More Premium?

We would choose the Audi Q8 for its cleaner and more restrained exterior design.

However, buyers seeking a bolder appearance may prefer the Mercedes GLE Coupé.

There is no clear objective winner in this category.

Audi Q8 vs Mercedes GLE 450 Dimensions and Boot Space

Dimensions matter when choosing a large luxury SUV in Australia.

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These vehicles must accommodate families, shopping, luggage and sometimes recreational equipment.

Exterior Dimensions Comparison

The Audi is approximately 64 mm longer, while the Mercedes is slightly wider and taller.

Despite its sporty roofline, the Mercedes offers a larger quoted boot capacity with the rear seats upright.

However, boot capacity alone doesn't reveal everything about practical usability.

The shape of the luggage compartment, loading height and rear hatch opening can significantly affect how easily bulky items fit.

Rear Passenger Space

The Audi Q8 has a longer wheelbase, which contributes to its generous passenger accommodation.

Its rear seating area feels particularly suitable for adults travelling long distances.

The GLE 450 Coupé also provides comfortable rear accommodation, although its sweeping roofline may affect the perception of overhead space.

We recommend checking rear headroom carefully if your passengers are particularly tall.

Is the Audi Q8 a Seven-Seater?

No. The Audi Q8 SUV is a five-seater.

Similarly, the GLE 450 Coupé discussed here accommodates five passengers.

Some conventional Mercedes GLE SUV configurations offer optional seven-seat accommodation, depending on the model and market, but that should not be confused with the GLE 450 Coupé.

For buyers who genuinely need seven seats, the Audi Q7 or a suitable conventional GLE SUV configuration would be more appropriate.

Winner: Mercedes GLE 450 for quoted boot volume; Audi Q8 remains an excellent choice for spacious five-seat travel.

Interior Quality and Luxury Features

Luxury SUVs need to provide much more than attractive exterior styling.

Interior quality, seating comfort and technology strongly influence the ownership experience.

Audi Q8 Interior

Inside the Audi Q8, the emphasis is on modern design, precise construction and sophisticated materials.

The cabin features Audi's Virtual Cockpit digital instrumentation and MMI touchscreen technology.

Depending on specification, highlights include:

• Digital driver instrumentation.
• Dual central touchscreen controls.
• Premium leather upholstery.
• Electrically adjustable front seats.
• Heated front seats.
• Ambient interior lighting.
• Premium audio options.
• Smartphone connectivity.
• Multi-zone climate control.

We particularly appreciate the Q8's restrained dashboard design.

The digital displays integrate into the cabin rather than dominating its appearance.

However, some drivers may dislike using a touchscreen for functions that previously had physical controls.

Mercedes GLE 450 Interior

The updated GLE takes a different approach.

Its cabin places greater visual emphasis on digital technology and the overall luxury experience.

One of the most significant upgrades is the new MBUX Superscreen arrangement.

This system combines three 12.3-inch displays beneath a continuous glass surface, incorporating driver information, infotainment and a front-passenger screen.

Other available features include:

• Advanced voice assistance.
• High-quality interior upholstery.
• Electrically adjustable seating.
• Ambient lighting.
• Premium Burmester audio.
• Digital navigation.
• Advanced parking technology.
• Smartphone integration.
• A range of comfort-enhancing options.

The updated Mercedes system offers a particularly impressive technology experience.

Its newer software platform also supports broader vehicle software updates.

Which Has the Better Interior?

The Audi Q8 offers an elegant, beautifully finished cabin that still feels modern.

The Mercedes GLE 450 provides a more visually striking dashboard and newer infotainment architecture.

For buyers who prioritise the latest in-car technology, the Mercedes has the advantage.

For those who prefer a more understated design, the Audi remains extremely appealing.

Winner: Mercedes GLE 450 for latest-generation technology; Audi Q8 for minimalist interior design.

Driving Comfort and Handling on Australian Roads

Australian driving conditions can vary considerably.

A luxury SUV should perform confidently on city streets, uneven suburban roads, highways and winding country routes.

Audi Q8 Ride and Handling

The Q8 feels exceptionally stable at highway speeds.

Its quattro all-wheel-drive system contributes to confident cornering and dependable traction.

Adaptive air suspension also helps balance driving comfort with body control.

This gives the Audi a useful combination of:

• Comfortable highway cruising.
• Controlled body movements.
• Confident cornering.
• Excellent high-speed stability.
• Adjustable driving characteristics.

The Q8's substantial weight is still noticeable during aggressive driving, but it generally feels composed and predictable.

Mercedes GLE 450 Ride Comfort

The Mercedes GLE 450 is designed to deliver refined, effortless driving.

Its smooth inline-six engine and nine-speed transmission make highway acceleration particularly relaxing.

The updated Australian GLE 450 Coupé includes comfort-oriented suspension, with AIRMATIC air suspension available as an option.

That distinction matters because suspension configuration can significantly affect ride quality.

Large alloy wheels and low-profile tyres may also make rough roads more noticeable.

With the appropriate suspension equipment, the GLE can provide a highly comfortable long-distance experience.

Which Is Better for Highway Driving?

Both vehicles are excellent highway cruisers.

We slightly favour the Audi Q8 for its blend of ride control, standard adaptive air suspension and confident handling.

However, the Mercedes has an advantage in engine performance and may appeal more strongly to drivers who prioritise relaxed acceleration.

Audi Q8 vs Mercedes GLE 450 Towing Capacity Australia

Towing is particularly important for Australian buyers.

Whether you're transporting a boat, towing a caravan or carrying recreational equipment, vehicle capability matters.

Towing Capacity Comparison

The Audi Q8 offers a substantial advantage.

Its maximum rated braked towing capacity of 3,500 kg is 800 kg greater than the GLE 450 Coupé's 2,700 kg rating.

This difference becomes important for owners considering heavier caravans or trailers.

Nevertheless, maximum towing capacity is only one part of the calculation.

Australian drivers must also check the permitted towball download, gross vehicle mass, gross combination mass, towbar rating and available payload.

Passengers, luggage and accessories can reduce the amount of trailer weight a vehicle can legally accommodate.

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Winner: Audi Q8 for towing capacity.

Reliability: Audi Q8 vs Mercedes GLE 450

Reliability is understandably important when purchasing an expensive European luxury SUV.

Both manufacturers produce sophisticated vehicles, but complexity can introduce higher maintenance and repair costs as the vehicles age.

Audi Q8 Reliability

The Q8's turbocharged V6 powertrain offers smooth performance, but long-term ownership requires consistent maintenance.

Potential areas worth monitoring include:

• Cooling system components.
• Electronic sensors and control modules.
• Air suspension operation.
• Infotainment system faults.
• Battery and mild-hybrid electrical components.
• Transmission servicing requirements.

These are potential inspection points rather than problems guaranteed to affect every Q8.

A vehicle with comprehensive service documentation is generally preferable to one with an incomplete maintenance history.

Mercedes GLE 450 Reliability

The Mercedes GLE 450 also features substantial mechanical and electronic complexity.

Areas to inspect during ownership include:

• Cooling system performance.
• Electrical and electronic faults.
• Mild-hybrid components.
• Suspension systems, particularly where air suspension is fitted.
• Infotainment functionality.
• Engine and transmission operation.

The updated model also introduces newer electronics, which means its long-term reliability cannot yet be established from several years of owner experience.

Which Is More Reliable?

There isn't sufficient evidence to confidently claim that either specific model is universally more reliable.

Both can provide dependable ownership when properly maintained, but repairs outside warranty can be costly.

For used examples, we would prioritise service history, independent mechanical inspections and the condition of the individual vehicle over assumptions about either badge.

Reliability verdict: No definitive winner. Maintenance history and vehicle condition matter more.

Maintenance Costs and Warranty in Australia

Luxury vehicle ownership involves expenses beyond fuel.

Servicing, tyres, insurance and depreciation should all be included in the budget.

Service Intervals

The Audi Q8 commonly specifies servicing every 12 months or 15,000 kilometres, whichever comes first.

The Mercedes GLE 450 has a typical scheduled interval of 12 months or up to 25,000 kilometres for the relevant Australian specification.

These intervals do not necessarily mean the Mercedes will cost less to maintain.

Individual servicing tasks and service-plan prices vary.

Warranty Comparison

Both manufacturers offer a five-year, unlimited-kilometre new-car warranty in Australia.

Roadside assistance arrangements may also apply, subject to their individual terms.

Which SUV Is Cheaper to Maintain?

Without comparing equivalent written servicing quotes, it's difficult to declare a reliable winner.

Both vehicles can incur considerable expenses for:

• Premium replacement tyres.
• Brake discs and pads.
• Specialist servicing.
• Suspension repairs.
• Electronic components.
• Insurance premiums.

We would obtain a complete servicing quotation covering at least five years before purchasing either SUV.

For used vehicles, retaining a maintenance reserve is particularly important.

Audi Q8 vs Mercedes GLE 450 Price Australia

Purchase price is another important difference.

For the specified Australian models, the Audi has a clear advantage.

Australian Pricing Comparison

The Mercedes costs approximately $16,000 more before considering optional equipment and on-road expenses.

That difference could fund servicing, insurance, accessories or a considerable amount of fuel.

However, the Mercedes also provides additional engine performance and newer cabin technology.

Important Australian Model Availability Note

The updated GLE 450 Coupé was announced for the Australian market in 2026 as an MY27 vehicle. Its local arrival was initially planned for November 2026, with subsequent reporting indicating a possible delay into early 2027.

Earlier GLE 450 vehicles remain relevant in the used and dealer-demonstrator market.

Buyers should also distinguish the petrol GLE 450 from the GLE 450 d turbo-diesel, which has different specifications and was dropped from the updated Australian lineup.

Which Offers Better Value?

For buyers prioritising equipment, towing capability and purchase price, we believe the Audi Q8 presents a strong argument.

However, buyers particularly attracted to the Mercedes' updated interior and more powerful engine may consider its premium worthwhile.

Winner: Audi Q8 for value at the quoted list prices.

Which SUV Is Better for Different Australian Drivers?

The most suitable vehicle depends heavily on individual priorities.

Choose the Audi Q8 If You Want:

• A stylish luxury SUV with understated design.
• Excellent all-wheel-drive stability.
• Strong towing capability.
• Lower official fuel consumption.
• Standard adaptive air suspension.
• A more affordable purchase price.
• A sophisticated and high-quality interior.

Choose the Mercedes GLE 450 If You Want:

• Stronger acceleration.
• A smooth turbocharged inline-six engine.
• The latest Mercedes-Benz infotainment technology.
• An expressive coupe-style SUV design.
• Impressive luxury features.
• A slightly larger quoted boot capacity.
• The experience of owning a high-performance Mercedes-Benz without stepping up to an AMG variant.

Audi Q8 vs Mercedes GLE 450: Which Would We Buy?

After comparing their strengths and weaknesses, our preference for many Australian buyers would be the Audi Q8.

The reason is not that the Mercedes is inferior.

In fact, the GLE 450 offers an excellent engine, impressive acceleration and sophisticated technology.

However, the Q8 combines so many important qualities in one package.

It offers powerful performance, comfortable suspension, exceptional towing ability, premium interior finishes and competitive fuel economy.

It also has a meaningful price advantage.

For drivers who want a luxury SUV that feels equally comfortable on motorways, suburban streets and long-distance journeys, the Q8 is a particularly compelling choice.

Nevertheless, buyers who value the newer Mercedes infotainment system and more powerful engine may reasonably prefer the GLE 450.

Ultimately, both deserve a test drive.

Frequently Asked Questions About the Audi Q8 vs Mercedes GLE 450 Australia

1. Is the Audi Q8 better than the Mercedes GLE 450?

The Audi Q8 is better for buyers prioritising towing capacity, official fuel economy and purchase price. The Mercedes GLE 450 offers stronger acceleration and newer infotainment technology. Both are excellent luxury SUVs, and the better choice depends on your priorities.

2. Which is faster, the Audi Q8 or Mercedes GLE 450?

The updated Mercedes GLE 450 Coupé is faster. It accelerates from 0–100 km/h in approximately 5.3 seconds, compared with 5.9 seconds for the petrol Audi Q8. The Mercedes also produces more power and torque.

3. Is the Audi Q8 more fuel efficient than the Mercedes GLE 450?

Yes, according to the quoted Australian combined consumption figures. The Audi Q8 petrol uses approximately 9.2 L/100 km, while the updated Mercedes GLE 450 Coupé is rated at 10.2 L/100 km. Actual results will depend on driving conditions.

4. Which SUV is more reliable, Audi Q8 or Mercedes GLE 450?

Neither model has a definitive reliability advantage established across all variants and model years. Both use complex turbocharged engines, mild-hybrid technology and advanced electronics. Regular maintenance and a complete service history are essential for long-term ownership.

5. Which is better for towing a caravan in Australia?

The Audi Q8 is generally the better choice for heavier towing because its maximum braked towing capacity is 3,500 kg, compared with 2,700 kg for the petrol Mercedes GLE 450 Coupé. Buyers must still check all relevant vehicle, trailer and towball weight limits before towing.

Final Verdict: Audi Q8 vs Mercedes GLE 450 Australia

The battle between the Audi Q8 and Mercedes GLE 450 highlights just how competitive the Australian luxury SUV market has become.

Both deliver impressive performance, premium materials, advanced technology and excellent long-distance refinement.

The Mercedes GLE 450 stands out with its powerful inline-six engine, improved acceleration and modern MBUX Superscreen interior.

However, the Audi Q8 offers a particularly appealing combination of sophistication, comfort, towing capability and value.

Its lower official fuel consumption and significantly stronger maximum towing rating make it especially attractive for Australian buyers who want more than a stylish luxury vehicle.

Our final assessment is straightforward: the Audi Q8 is the more balanced all-round choice for many Australian drivers, while the Mercedes GLE 450 is the stronger option for those prioritising performance and cutting-edge cabin technology.

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