Audi 2.5-liter TFSI takes the “International Engine of the Year 2011” award

Article by Christian A., on May 18, 2011

The Audi 2.5-liter TFSI has been named as the “International Engine of the Year 2011” in the 2-liter to 2.5-liter category. The awards were decided via voting by a jury of 76 motoring journalists throughout the world. This is also the same award that this engine won last year. The 2.5-liter unit that was installed on the Audi RS 3 Sportback and TT RS Coupé and Roadster utilize two core technologies from Audi: turbocharging and FSI direct gasoline injection technology.

This engine has a displacement of 2,480 cubic centimeters and has an output of 250 kW (340 hp) between 5,400 and 6,500 rpm and peak torque of 450 Nm (332 lb-ft) from 1,600 to 5,300 rpm.

The jury members described the 2.5-liter engine as “certainly the best turbocharged engine in recent years.” They say that the engine has power, torque, and a “great sound” that is reminiscent of the original quattro rally racing engine that had made Audi so famous. The Audi TT RS Coupé was developed by quattro GmbH and is able to accelerate from zero to 100 km/h (62 mph) in 4.3 seconds while the Roadster has a sprint time of 4.4 seconds.

The Coupè and Roadster have an optional top speed of 280 km/h (174 mph). Presently, Audi offers the same engine that is fitted on the two TT RS models in the RS 3 Sportback.

It has an acceleration time of 4.6 seconds to go from a standstill to 100 km/h (62 mph), considered a best-in-class performance figure. It has a governed top speed of 250 km/h (155 mph). This award marks Audi TFSI technology’s seventh straight category win at the International Engine of the Year Awards. From 2005 to 2009, the Audi 2.0-liter TFSI engine had received the recognition in the 1.8 to 2.0-liter category.

Considered as the first ever classic sports car to come from the RS family, the Audi TT RS was created by Audi’s quattro GmbH unit to be an adulterated and complete driving machine. This was the same treatment given to both the RS4 and the RS6. One of the highlights of the TT RS can be seen in the chassis which was developed using the pioneering design of the Audi TT. A significant component of this chassis is the four-link rear suspension which can control independently the lateral forces and the longitudinal forces. Looking closely, one can see a novel combination of materials with the front making use of aluminum while the back utilizes sheet steel.

This particular mix however brings with it an axe load distribution that is well-balanced and even provides exceptional crash safety. It also results in a remarkable rigid, one of the reasons why the TT RS can deliver precise handling. In addition, the chassis helps with the electromechanical steering making it more effective and ensuring that the power steering is able to adapt to the speed of the vehicle. Two types of chassis will be offered by Audi. The first is the sports chassis, equipped as standard, which has shock absorbers and springs that have been firmly tuned.

It also drops the body by 10 mm (0.39 in.), making it closer to the ground. The second one, offered as an option, is the adaptive magnetic ride damping system. What this does is control the shock absorbers under two modes. The first is Comfort which results in a more balanced ride and suited especially for long travels. The second is Dynamic which makes the vehicle become closer to the road. Selection between the two is simple as all one needs to do is to trigger the Sport button. That the engine delivers excellent power is without question as the TT RS was created to be a pure driving vehicle. However, in order to properly transmit this amount of power, the engine has been paired with the manual six-speed transmission. The highlights of this transmission include having a narrow range with respect to its gear ratios and a high efficiency ratio.

There is another important attribute to this transmission in that the shift lever itself was designed in way that it would result to a short shift travel. This in turn resulted in having a precise yet simple operation. Fitted as standard in the TT RS is the quattro permanent all-wheel drive, where the key role is on its rear axle, specifically its hydraulic multi-plate clutch which can be controlled electronically. Should the need arise this system is able to transmit majority of the torque that is on the front wheels and send it to the rear wheels. Once this happens, in just moments, the accumulator works with the electrical pump and utilizes hydraulic pressure in order to push the plates of the clutch. The Audi TT RS features quattro permanent all-wheel drive as standard equipment. Its heart lies at the rear axle: an electronically controlled, hydraulic multi-plate clutch. If a situation calls for it, the clutch redirects a majority of the torque input from the front wheels to the rear wheels.

Within milliseconds, a powerful electrical pump in conjunction with an accumulator presses together the clutch's plates via hydraulic pressure. Meanwhile, due to the quattro drivetrain, the TT RS is able to deliver first-rate stability in addition to having interesting dynamics and superior traction. Whether the TT RS is running laps on a track or going up those winding roads in the countryside, precise handling is guaranteed. Indeed, every mile inside the TT RS is a one of a kind experience, especially with its spirit of sportiness. This is felt with the power delivered by the engine; the amazing grip when the vehicle exits a curve; its neutrality when at the cornering limit; the highly responsive steering; or even the immediate reaction from the chassis. The quattro powertrain is also equipped with what can be described as heavy-duty parts.

This includes the compact rear-axle differential and the constant velocity joint that has been placed just before its propeller shaft. For the TT line-up, the sportiest model will come with the 18-inch wheels and installed with the sized 245/45 tires. Matching this particular feature are the ventilated disc brakes. The ones in front have a diameter that measures 370 mm (14.57 in) while the ones in the rear measure 310 mm (12.20 in). Since the friction rings in the front are pierced, this helps dispel the heat faster. These rings are connected to the aluminum brake discs through the use of hollow pins. The brake discs itself are enclosed by the four-piston brake calipers which carry the RS logo, come in black, and made of aluminum.

Topics: audi, engine, award

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