For decades, the five-cylinder engine from Audi has been more than just a powertrain; it’s a symbol of the brand’s identity, a legacy forged in motorsport victories and refined for exhilarating everyday driving. This engine, particularly the 2.5 TFSI, has consistently earned accolades, including nine consecutive “International Engine of the Year Awards” since 2010, cementing its place in Audi’s “Vorsprung durch Technik” philosophy. Known for its distinctive 1-2-4-5-3 firing order and the captivating, throaty sound it produces, the Rs3 Engine continues to push boundaries in the new RS 3 models, outperforming its rivals and setting new standards in the compact performance segment.
Unleashing More Torque: A Boost in Responsiveness
The heart of the new Audi RS 3, the celebrated five-cylinder engine, now delivers an impressive 294 kW (400 PS). This peak power is sustained across a broad rev range, from 5,600 to 7,000 rpm, making it accessible earlier and for longer durations compared to previous iterations. This translates to a more aggressive and responsive power curve. Audi engineers haven’t stopped there; they’ve enhanced the engine’s torque, increasing it by 20 Nm to a formidable 500 Nm. This surge of pulling power is available between 2,250 and 5,600 rpm. While maintaining the same peak horsepower as its predecessor, this RS3 engine boasts noticeably improved responsiveness, especially in the low to mid-range revs, resulting in quicker acceleration and a more engaging driving experience. Equipped with Launch Control as standard, the new RS 3 catapults from 0 to 100 km/h (62 mph) in a mere 3.8 seconds, shaving off three-tenths of a second from the previous model.
For drivers craving even higher speeds, Audi offers the option to increase the electronically limited top speed from 250 km/h (155 mph) to 280 km/h (174 mph). Opting for the RS dynamics package plus, which includes a ceramic brake system and adaptive suspension, pushes the limit even further to a staggering 290 km/h (180 mph). These figures firmly establish the Audi RS 3 and its RS3 engine as benchmarks for acceleration and top speed within the compact car class.
Harnessing the potent output of the five-cylinder engine is a rapid-shifting 7-speed dual-clutch transmission, engineered for quicker gear changes and sporty ratios. Drivers can select automatic modes (D and S) for the lightning-fast S tronic transmission or take manual control using steering wheel paddle shifters. Working in concert with a faster onboard power system, the advanced engine control unit intelligently orchestrates the interaction between the quattro all-wheel-drive system with torque splitter, the dual-clutch transmission, electronic stabilization control, and the optional adaptive dampers, ensuring optimal performance and handling in all driving situations.
| Audi RS 3 | 2.5 TFSI |
|---|---|
| Displacement in cm3 | 2,480 |
| Max. power in kW (PS) at /min | 294 (400) at 5,600 – 7,000 |
| Max. torque inNm at /min | 500 at 2,250 – 5,600 |
| Top speed in km/h | 250, optionally 280 and 290 with RS dynamics package plus |
| Acceleration from 0 to 100 km/h in s | 3.8 |
| Combined fuel consumption in l/100 km | 8.8 – 8.3 (Sportback) 8.7 – 8.2 (Sedan) |
| Combined CO2 emissions in g/km | 201 – 190 (Sportback) 198 – 188 (Sedan) |
| Transmission | 7-speed S tronic, quattro permanent all-wheel drive with torque splitter |
TFSI Technology and Engine Efficiency: Power with Intelligence
The TFSI designation, a hallmark of Audi engineering, signifies Turbocharged Fuel Stratified Injection. Audi pioneered this combination for large-scale production in 2004. In the new RS3 engine, the exhaust gas turbocharger delivers 1.5 bars of relative boost pressure. Extensive engineering efforts have focused on minimizing internal friction while maximizing power. Lightweight materials are strategically employed throughout the engine construction. For instance, the oil pan is crafted from magnesium, and the crankcase of the 2.5 TFSI is made of aluminum. Further enhancing efficiency and durability, the cylinder barrels feature a plasma coating, the crankshaft is hollow-bored, and the aluminum pistons incorporate oil cooling channels.
To expedite the warm-up phase after a cold start, a switchable water pump prevents coolant circulation in the cylinder head during the initial period. This innovative approach allows the RS3 engine to reach its optimal operating temperature much faster, reducing friction and improving fuel economy.
The Emotional Symphony: The Unmistakable Five-Cylinder Sound
A defining characteristic of the RS3 engine is its emotionally charged and unmistakable sound. This sonic signature is born from the unique combination of an odd number of cylinders and the specific 1-2-4-5-3 firing order. This firing sequence, further enhanced by the redesigned intake and exhaust systems, creates the distinctive five-cylinder roar that enthusiasts adore. The 2.5 TFSI’s firing interval occurs every 144 degrees of crankshaft rotation, resulting in an alternating firing pattern between closely spaced and more distantly spaced cylinders, contributing to its unique auditory character.
For the first time, the exhaust system incorporates a fully variable flap control system. This advanced system enables the exhaust flaps to assume a range of intermediate positions depending on the selected Audi drive select mode. In “dynamic,” “RS Performance,” and “RS Torque Rear” modes, the flaps open significantly earlier compared to other driving modes, amplifying the emotional sound components and delivering a more pronounced auditory experience. For those seeking an even sportier sound, the optional RS sports exhaust system further intensifies the engine’s auditory character, providing an unparalleled sound experience.
Enhanced Efficiency: Coasting and Intelligent Mode Selection
Despite its increased power output, the RS3 engine in the latest models achieves even greater efficiency. The consumption-focused “efficiency” mode, selectable via Audi drive select, employs a flatter accelerator pedal curve. This mode limits the available torque and power to a maximum of 80 percent under normal driving conditions, instantly unleashing full power upon kickdown when maximum acceleration is demanded. Furthermore, the five-cylinder engine now features coasting with the engine running for the first time. Both intake and exhaust camshafts adjust dynamically as needed. On the exhaust side, the Audi valvelift system (AVS) modulates the valve opening duration in two stages, contingent on engine load and speed. This system optimizes fuel consumption during low and partial loads while ensuring spontaneous response and robust power delivery under full load. Contributing to reduced emissions, the RS 3 is equipped with two large-volume gasoline particulate filters featuring optimized coating.
The RS3 engine continues to evolve, delivering not only exhilarating performance but also enhanced efficiency and a truly captivating driving experience. Its legendary five-cylinder configuration, coupled with cutting-edge technology, ensures its reign as a benchmark in the world of high-performance compact cars.
