What engine does the Audi RS4 have?

[DelMolly]

The Audi RS4 is equipped with a 2.9-liter V6 twin-turbocharged engine. The engine delivers a maximum power output of 331 kW and a peak torque of 600 Nm. The maximum power is achieved between 5,700 to 6,700 rpm, while the maximum torque is available from 1,900 to 5,000 rpm. This engine features direct fuel injection technology and utilizes an aluminum alloy cylinder head and block. The Audi RS4 employs a five-link independent suspension at both the front and rear. The vehicle comes with a full-time four-wheel-drive system and uses a Torsen differential.

[AthenaLee]

I drove my friend's RS4 Avant, and that 2.9-liter V6 twin-turbo engine is truly addictive. With 450 horsepower pushing this wagon, the moment you step on the throttle feels like being catapulted forward. What's most special is its power delivery characteristics: the turbos kick in at low RPMs, completely unlike the laggy feel of older turbocharged cars. I specifically looked it up—this engine, codenamed EA839, shares technology with the Porsche Panamera. Its direct injection and twin-scroll turbo design make it both ferocious and refined. In stock form, it can hit 0-100 km/h in just 4.1 seconds, and the exhaust backfire sounds like a symphony when you roll down the windows in a tunnel.

[MacAlexa]

The heart of the Audi RS4 is a 2.9T V6 engine, but many people are unaware of its brilliance. I once witnessed a modified RS4 at a track day, and the mechanic mentioned this machine has enormous potential. The factory 450 horsepower is just the starting point—a stage 1 tune can push it beyond 500 hp, thanks to its reinforced pistons, connecting rods, and crankshaft. However, be warned: its turbo placement is tricky, nestled within the V-angle of the cylinders, making later repairs quite challenging. My neighbor’s RS4, with 80,000 kilometers on the odometer, still runs strong, but it demands full-synthetic 0W-30 oil, and routine maintenance is noticeably costlier than a standard A4.

[VonKai]

The new RS4 is equipped with a 2.9-liter twin-turbo V6 engine, which is lighter and more powerful than the old 4.2L V8. Despite the smaller displacement, the two turbos squeeze out 450 horsepower while being more fuel-efficient. During a test drive, I noticed its cylinder deactivation technology is quite clever: it automatically shuts down three cylinders during steady cruising. The sport exhaust features valve control – it's as quiet as a regular wagon when grocery shopping, but switch to RS mode with valves fully open, and the whole neighborhood knows you're heading out. Just remember to maintain it more frequently, as turbo temperatures can reach over a thousand degrees.

[Rudy]

People often ask about the differences between the RS4 and S4 engines. The RS4's 2.9T engine block is made of aluminum-silicon alloy, which is 15kg lighter than the S4's 3.0T. Its turbo boost pressure is tuned higher, with fuel injector pressure reaching 250bar, resulting in more complete combustion of the air-fuel mixture. I've seen disassembled parts - the intake manifold is carbon fiber, and the two turbo shaft blades are only the size of a coin but spin at over 200,000 rpm. The downside is higher oil consumption compared to regular Audis, so it's best to check the oil level after spirited driving. However, its longitudinal layout paired with the Torsen differential makes power distribution particularly intelligent during cornering.

[StEvan]

Those who are into Audis know that the RS4's EA839 engine actually has a racing heart. Its dry sump design shares the same origin as the R8, ensuring no oil starvation during aggressive cornering. Last month at the repair shop, I saw a disassembled unit and noticed the crankcase was even reinforced with bolts—no wonder it can handle 700 Nm of torque. The cooling system is also over the top, featuring an additional intercooler and water-cooling circuit. For daily driving, keep two things in mind: avoid flooring it immediately after a cold start, as the turbo needs about 30 seconds to build oil pressure; prolonged low-speed city driving can lead to carbon buildup, so it's recommended to add a bottle of fuel system cleaner every 5,000 kilometers.