Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe
Compare the Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe. The Audi RS6 Avant is £47,000 cheaper. The Mercedes-AMG GT 63 4MATIC+ Coupe is 0.4s 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 0-62 mph in 3.6 s, a top speed of 155 mph (standard limiter), sent to the road via all-wheel drive. The Mercedes-AMG GT 63 4MATIC+ Coupe is priced from £155,000, powered by a 4.0L Twin-Turbo V8, producing 577 hp, with 800 Nm of torque, reaching 0-62 mph in 3.2 s, a top speed of 196 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 3 years / 60,000 miles (original UK cover; first 2 years unlimited) warranty. The Mercedes-AMG GT 63 4MATIC+ Coupe offers a 321-litre boot, runs on petrol, returns around 22 mpg, is covered by a 3 years / unlimited miles (original UK new-car cover) warranty.
On cost of ownership, the Audi RS6 Avant is £47,000 cheaper than its rival, the Audi RS6 Avant costs less in annual maintenance (£1,100 versus £1,600), the Audi RS6 Avant is the more fuel-efficient choice, the Audi RS6 Avant has 73 L fuel tank, the Mercedes-AMG GT 63 4MATIC+ Coupe has 70 L fuel tank.
Driving Character: Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe
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 C192 AMG GT63 Coupe uses a 430 kW twin-turbo 4.0-litre V8, delivering 800 Nm through AMG Performance 4MATIC+ all-wheel drive and a nine-speed MCT transmission. Active rear-wheel steering and active roll control support its chassis. The manufacturer quotes 3.2 seconds from 0 to 100 km/h; this must not be presented as a 0-60 mph measurement.
Head-to-head, the division is clear: the Audi RS6 Avant — 591hp estate car with AWD; fastest family estate in its class; the Mercedes-AMG GT 63 4MATIC+ Coupe — AMG 4.0L bi-turbo V8; exceptional throttle response and emotional delivery. Characteristic of the Audi RS6 Avant: Air suspension and adaptive dampers span luxury to performance seamlessly. For the Mercedes-AMG GT 63 4MATIC+ Coupe: AMG Performance 4MATIC+ all-wheel drive, active rear-wheel steering and active roll control support the C192 chassis. In outright terms it is 591 hp against 577 — a 14 hp gap — and the Mercedes-AMG GT 63 4MATIC+ Coupe reaches 60 mph 0.4s sooner.
Interior & Cabin: Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe
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.
The C192 cabin combines a digital instrument display with an 11.9-inch portrait central touchscreen running MBUX. AMG sports seats are standard; Performance seats are optional. The optional rear seats create a 2+2 layout rather than full-size rear passenger accommodation.
Head-to-head, the division is clear: the Audi RS6 Avant — Premium estate cabin with genuine rear seat space and huge load area; the Mercedes-AMG GT 63 4MATIC+ Coupe — Long bonnet, short tail design creates distinct, dramatic driving environment. Characteristic of the Audi RS6 Avant: Optional carbon, Alcantara, and sport seats; widely personalised in practice. For the Mercedes-AMG GT 63 4MATIC+ Coupe: AMG sports seats are standard; Performance seats are optional.
Daily Usability: Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe
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.
The C192 has a rear luggage compartment accessed through a large hatch. The manufacturer lists 321 litres, expanding to 675 litres with the applicable rear-seat configuration. The optional 2+2 layout is intended for rear occupants up to 1.50 metres tall.
Head-to-head, the division is clear: the Audi RS6 Avant — 565L boot with rear seats; grows to 1,680L with seats folded — best in class; the Mercedes-AMG GT 63 4MATIC+ Coupe — The C192 has a 321-litre luggage compartment, expanding to 675 litres with the applicable rear-seat configuration.. Characteristic of the Audi RS6 Avant: Genuinely usable as family and performance car simultaneously. For the Mercedes-AMG GT 63 4MATIC+ Coupe: Comfort mode genuinely softens the GT for road use. that means 565 litres of boot space against 321, and everyday running costs that favour the Audi RS6 Avant at the pumps.
Ownership: Audi RS6 Avant vs Mercedes-AMG GT 63 4MATIC+ Coupe
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.
Owning an AMG GT is an investment in the traditional, high-performance V8 heritage of the brand. Residual values remain strong, bolstered by consistent demand from enthusiasts who prize the V8 character. Servicing is handled through the robust Mercedes dealer network, ensuring that specialists are always within reach, though owners must prepare for high costs associated with performance-grade brakes and tyres. Annual maintenance of £1,600 is standard for the class. Insurance costs reflect the car’s high performance and the complexity of its mechanical components, yet the model remains a prized inclusion in the garages of those who value pure engagement.
Head-to-head, the division is clear: the Audi RS6 Avant — RS6 is the definitive dual-purpose performance estate; values reflect broad demand; the Mercedes-AMG GT 63 4MATIC+ Coupe — Mercedes dealer network comprehensive; AMG GT well-supported globally. Characteristic of the Audi RS6 Avant: Audi Approved Used programme strong; wide service support. For the Mercedes-AMG GT 63 4MATIC+ Coupe: AMG GT has strong used market demand; values hold well. On the wallet the two diverge at £108,000 versus £155,000 — a £47,000 difference, with annual maintenance of £1,100 against £1,600, and warranty cover of 3 years / 60,000 miles (original UK cover; first 2 years unlimited) versus 3 years / unlimited miles (original UK new-car cover).