Undefined Audi RS6 Avant 2013-2018: Legendary V8 Performance

The Audi RS6 Avant from 2013 to 2018 stands as a benchmark in high-performance estates, primarily thanks to its revolutionary **4.0-liter twin-turbo V8 engine**. This powerplant, co-developed with Bentley, replaced the thirsty V10 of the previous generation, offering superior speed, efficiency, and refinement while maintaining the model’s reputation for blending family hauling with supercar thrills. Available in standard and Performance variants, it propelled the RS6 to 0-62mph times under 4 seconds, all from an estate car weighing nearly two tons.

Evolution from V10 to V8 Mastery

Prior to 2013, the RS6 relied on a massive 5.0-liter Lamborghini-sourced V10, producing 572bhp but guzzling fuel and emitting high CO2 levels. The C7 generation marked a bold shift to a more efficient **twin-turbocharged 4.0-liter V8**, prioritizing power density and emissions compliance without sacrificing acceleration. This engine family powered models across Audi’s lineup, from the S8 to Bentley’s Continental GT, underscoring its versatility.

The base 2013 RS6 delivered **552bhp at 5,700rpm** and **516lb ft of torque from 1,750rpm**, channeled through an eight-speed ZF automatic transmission and Audi’s quattro all-wheel-drive system with a Torsen center differential. This setup ensured phenomenal traction, making the RS6 faster than many sports cars despite its 1,950kg kerb weight.

Performance Variant: Unleashing Extra Power

Introduced later, the RS6 Performance edition elevated output to **597bhp (605PS)** and **700Nm (516lb ft)** of torque, shaving the 0-62mph sprint to **3.7 seconds**. Top speed remained electronically limited to 155mph (or 189mph with the optional Dynamic Plus pack), but real-world tests confirmed its brutal straight-line ability. The V8’s low-end torque surge, aided by twin turbochargers spooling early, provided addictive pull from standstill.

This table highlights the incremental gains, with the Performance model’s sports exhaust enhancing the V8’s thunderous soundtrack in Dynamic mode.

Innovative Cylinder-On-Demand Technology

A standout feature was Audi’s **cylinder-on-demand (COD)** system, which deactivated four cylinders (2, 3, 5, and 8) during light-load cruising by closing their inlet and exhaust valves. This switched the engine to a four-cylinder mode, improving efficiency to a claimed **28.8mpg combined**—remarkable for a 2-tonne super-estate. In practice, owners reported 27mpg on mixed runs, with CO2 at 223g/km, placing it in a high tax bracket but competitive for its class.

The transition between modes was seamless, undetectable to occupants, allowing the full V8 to roar back under demand. This tech, later refined in smaller Audi engines, demonstrated the RS6’s forward-thinking engineering.

Transmission and Drivetrain Synergy

Paired with the **eight-speed torque-converter automatic**, the V8 shifted with lightning precision, outperforming rivals’ dual-clutch units in smoothness for everyday driving. Quattro all-wheel drive distributed power optimally, with optional rear-wheel torque vectoring in later models enhancing cornering agility. High-performance brakes, including optional ceramics, were essential for hauling down the mass from triple-digit speeds.

Driving Dynamics and Modes

Select Comfort mode, and the RS6 glides silently, masking its potency for family duties. Switch to Dynamic, and the engine growls, suspension firms up via air adaptive dampers, and steering sharpens. Despite its size, it felt lighter than expected, though not as chuckable as a BMW M5. Straight-line speed was its forte, outpacing some Porsche 911s of the era.

• Comfort: Quiet cruising, high mpg potential.
• Dynamic: Full V8 fury, stiffened setup for track-like poise.
• RS Mode (Performance): Launch control, max aggression.

Fuel Economy and Running Costs

Official figures promised 28.8mpg, but enthusiastic driving dropped it to the low 20s. Annual road tax was around £295 after the first year’s £650, reflecting its 223g/km emissions. Premium fuel was mandatory, and maintenance on the complex V8 could be pricey, though reliability was generally strong if serviced properly.

Standard and Optional Equipment

Even the base model, priced from £76,985 new, included Matrix LED lights, 20-inch wheels, and MMI navigation. The Performance added 21-inch alloys, privacy glass, and a titanium pack for £88,500. Today, used prices start at £20,000, offering bargain supercar performance.

Common Issues and Maintenance Tips

The V8 proved durable, but watch for turbo wear, carbon buildup on valves, and air suspension leaks. Regular oil changes with Audi-spec 0W-40 are crucial. Ceramic brakes, while fade-resistant, are costly to replace. Pre-purchase inspections should check for uneven tyre wear from the quattro system.

• Turbochargers: Monitor for boost lag or smoke.
• Cylinder deactivation: Software updates prevent glitches.
• Transmission: Fluid changes every 40,000 miles.

Why the RS6 Engine Remains Legendary

This V8 didn’t just power the RS6; it set a template for modern super-estates, proving estates could dominate straights and circuits. Its blend of brutality and usability made it a do-it-all icon, faster than many saloons yet vastly more practical.

Frequently Asked Questions (FAQs)

What engine is in the 2013-2018 Audi RS6 Avant?

A 4.0-liter twin-turbo V8 with cylinder-on-demand tech, producing 552bhp standard or 597bhp in Performance guise.

How fast is the RS6 Avant 0-60?

3.9 seconds for standard, 3.7 for Performance—quicker than many sports cars.

Is the RS6 V8 reliable?

Yes, with proper maintenance; common issues are manageable compared to the prior V10.

What’s the fuel economy like?

Claimed 28.8mpg combined, real-world 25-27mpg on gentle drives.

Can you remap the RS6 engine?

Yes, tunes push over 700bhp, but void warranties and require supporting mods.

Buying Advice for Used RS6 Buyers

Seek low-mileage examples with full service history. Performance models hold value better. Budget for £2,000+ annual upkeep. Test dynamic modes and listen for V8 health on cold starts.