Audi RS6 Avant vs BMW M8 Competition
Compare the Audi RS6 Avant vs BMW M8 Competition. The Audi RS6 Avant is £27,000 cheaper. The BMW M8 Competition is 0.5s quicker to 60mph. The Audi RS6 Avant is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi RS6 Avant is priced from £108,000, powered by a 4.0L Twin-Turbo V8, producing 591 hp, with 800 Nm of torque, reaching 0-60 mph in 3.5s, a top speed of 190 mph, sent to the road via all-wheel drive. The BMW M8 Competition is priced from £135,000, powered by a 4.4L Twin-Turbo V8, producing 617 hp, with 750 Nm of torque, reaching 0-60 mph in 3s, a top speed of 190 mph, sent to the road via all-wheel drive.
The Audi RS6 Avant offers a 565-litre boot, folding rear seats, runs on petrol, returns around 24 mpg, is covered by a 3yr / unlimited mi warranty. The BMW M8 Competition offers a 420-litre boot, runs on petrol, returns around 23 mpg, is covered by a 3yr / unlimited mi warranty.
On cost of ownership, the Audi RS6 Avant is £27,000 cheaper than its rival, the Audi RS6 Avant costs less in annual maintenance (£1,100 versus £1,500), the Audi RS6 Avant is the more fuel-efficient choice, a full tank costs around £90 for the Audi RS6 Avant and £85 for the BMW M8 Competition.
Driving Character: Audi RS6 Avant vs BMW M8 Competition
The RS6 Avant is the definitive super-estate, wielding a 4.0L twin-turbo V8 that delivers 591 hp with crushing authority. Its Quattro system and all-wheel steering work in tandem to shrink the car’s perceived size, allowing it to navigate complex B-roads with surprising ease. The power delivery is immediate, bolstered by mild-hybrid assistance that masks any hint of lag. It is a master of cross-country velocity, offering a level of grip and composure that remains unmatched in the sector. While the 4575 lbs mass is present, the chassis balance is so well-sorted that it never feels overwhelmed or ponderous.
The BMW M8 Competition defines the modern grand tourer, blending brutal 617hp twin-turbocharged V8 performance with a sophisticated M xDrive all-wheel-drive system. While it possesses the pace to dismantle almost any supercar, its 4,395lb mass remains a constant consideration, particularly through tighter, technical sequences where it lacks the nimble precision of a lighter M4. The adjustable rear-biased drivetrain allows for playful rotation, yet the chassis is primarily tuned for crushing vast distances with absolute composure. It is a formidable machine that prioritises stability and immense, exploitable torque over raw, stripped-back track feedback, representing the ultimate high-speed cruiser in the current M portfolio.
Head-to-head, the division is clear: the BMW M8 Competition takes our 0-100 driving character grading, 75 against 78. Characteristic of the Audi RS6 Avant: Composed, quattro-assured pace rather than outright playfulness. For the BMW M8 Competition: Effortless, high-speed GT pace with genuine back-road ability. In outright terms it is 591 hp against 617 — a 26 hp gap — and the BMW M8 Competition reaches 60 mph 0.5s sooner.
Interior & Cabin: Audi RS6 Avant vs BMW M8 Competition
The cabin is a sanctuary of technology and luxury, defined by the high-definition Virtual Cockpit Plus and exquisitely finished Valcona leather. Every surface speaks to Audi's commitment to quality, with supportive sports seats that hold the driver firmly during high-speed cornering. The interior design is sophisticated, blending sharp, angular lines with an understated elegance. Despite being a tech-forward environment, the ergonomics remain intuitive, ensuring that even complex adjustments are simple to perform. It is a space designed for long journeys, offering a sense of calm and control, even when the engine is under full load.
Stepping into the M8 Competition reveals a cabin dripping in premium Merino leather and intricate carbon fibre detailing, confirming its status as a pinnacle M product. The ergonomics are quintessential BMW, featuring an intuitive, M-specific digital interface that provides all critical telemetry without overwhelming the driver. While the materials and build quality are exemplary, the two-door layout compromises access, and the rear quarters remain strictly occasional seats despite the car's generous overall proportions. It strikes a successful balance between a focused, driver-centric cockpit and the luxurious, refined ambiance expected of a high-end grand tourer, successfully isolating occupants from the road's harsher realities.
Head-to-head, the division is clear: the BMW M8 Competition takes our 0-100 interior & cabin grading, 85 against 86. Characteristic of the Audi RS6 Avant: Spacious, airy, premium cabin with excellent tech. For the BMW M8 Competition: Luxurious, driver-focused cabin with excellent build quality.
Daily Usability: Audi RS6 Avant vs BMW M8 Competition
Practically, the RS6 Avant is unrivalled as a high-performance family carrier. With 565 litres of boot space, which expands significantly when the seats are folded, it is ready for almost any task. The air suspension is a revelation, offering a plush, compliant ride for family trips while firming up instantly for spirited driving. Its wide body can be a liability in tight car parks, making the camera system a mandatory tool for urban navigation. However, the sheer ease with which it traverses miles in total comfort makes it an exceptional candidate for a single-car garage.
Despite its status as a performance powerhouse, the M8 Competition remains surprisingly liveable for daily duties. The 440-litre boot provides sufficient volume for weekend escapes, though the long doors and low seating position can hinder easy egress in tight urban car parks. Comfort mode successfully softens the adaptive suspension, making motorway slogs relatively effortless, while the all-wheel-drive system ensures the car remains secure in varied UK weather conditions. Its sheer width, however, requires constant vigilance in narrow city streets, as the low-profile rubber and stiff structural setup demand care when traversing speed bumps or uneven urban asphalt.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 daily usability grading, 92 against 70. Characteristic of the Audi RS6 Avant: Genuinely does everything — family transport, luggage and supercar-embarrassing pace. For the BMW M8 Competition: Comfortable, capable long-distance GT for daily use. that means 565 litres of boot space against 420, and everyday running costs that favour the Audi RS6 Avant at the pumps.
Ownership: Audi RS6 Avant vs BMW M8 Competition
Owning an RS6 Avant is an investment in unparalleled capability, though one must account for the significant running costs. With 24 mpg fuel economy and the wear associated with moving such high performance, it is not a cheap car to run. However, the Audi dealer network is top-tier, and the vehicle enjoys strong residual values, with enthusiasts constantly hunting for well-maintained examples. The annual maintenance costs are predictable for the segment, and the car's widespread support ensures longevity. For those who can stomach the fuel and service bills, it offers a level of excellence that is difficult to replicate.
Ownership of an M8 Competition is an exercise in managing significant operating costs, commensurate with its supercar-killing performance. The BMW dealer network offers comprehensive support, but prospective buyers should factor in the substantial expenses associated with premium tyres and high-performance brake components, which wear rapidly under enthusiastic use. While residuals have stabilised, the market for such a specific, high-output V8 GT remains relatively narrow. Annual maintenance costs are predictably high, though the car benefits from a robust community and global parts availability, ensuring that the heavy financial commitment yields a reliably formidable and well-documented performance machine.
Head-to-head, the division is clear: the Audi RS6 Avant takes our 0-100 ownership grading, 72 against 72. Characteristic of the Audi RS6 Avant: Widely reported as a genuine daily joy to own. For the BMW M8 Competition: Backed by strong BMW reliability reputation. On the wallet the two diverge at £108,000 versus £135,000 — a £27,000 difference, with annual maintenance of £1,100 against £1,500.