DecodedCarsAudi A6 vs Audi RS
2026 Audi A6 vs 2026 Audi RS — two rivals compared on efficiency, size, safety and reliability.
The short version
The Audi A6 is more fuel-efficient: 24 vs 23 MPG combined in its best version.
That works out to about $150 a year less in fuel for the Audi A6 (EPA estimate, 15,000 miles).
The Audi RS is the bigger car, about 2 inches longer.
Across all model years since 2005, the Audi RS has had fewer recall campaigns (14 vs 33).
The two cars
The 2026 Audi A6 is a midsize station wagon offered with a 3.0L 6-cyl turbo engine, including a hybrid version and all-wheel drive. It measures about 197 inches long and 74 inches wide on a 115-inch wheelbase, with a curb weight of roughly 4,319 lb (4dr Sedan).
The 2026 Audi RS is a subcompact car offered with 2 engines (2.5L 5-cyl turbo and 4.0L 8-cyl turbo), including a hybrid version and all-wheel drive. It measures about 197 inches long and 77 inches wide on a 115-inch wheelbase, with a curb weight of roughly 4,740 lb.
Buying used? The 2024 A6 and the 2020 RS have the fewest problems in our data; avoid the 2019 A6 and the 2021 RS.
Basics
Efficiency
Performance & space
Safety & reliability
Interest
Green = clearly better. Prices are not included. How we calculate this →
Which one should you choose?
Choose the Audi A6 if…
It doesn't clearly beat the Audi RS on any measure we track.
Choose the Audi RS if…
- You put reliability history first (14 vs 33 recalls since 2005)
Pros & cons of each
2026 Audi A6
- Hybrid version availableOffered as a hybrid as well as gas.
- Lots of standard safety tech4 of 5 key driver aids standard on the versions we checked.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
2026 Audi RS
- Hybrid version availableOffered as a hybrid as well as gas.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Full 2026 Audi A6 specs →Full 2026 Audi RS specs →Compare fuel costs for your driving →Compare size & garage fit →