The first Audi TT RS delivered some impressive performance numbers thanks to its 335 horsepower five-cylinder turbocharged engine, however the next version of the high-performance two door is said to trump the old car by a wide margin.
According to Motoring, the new TT RS will produce over 400 horsepower from a more tuned up version of the 2.5-liter five-cylinder turbocharged engine used in the new RS 3 Sportback. Unnamed sources at Audi also said the power increase will help the TT hustle from 0-60 mph in about 4 seconds and reach a limited top speed of 155 mph.
Stephan Reil and Heinz Peter Hollerweger, who oversee Audi’s quattro performance divison, wouldn’t confirm the rumors, or even that a new TT RS is on the way. The pair did shed some info on what it would take to up the output of the already power-dense 2.5-liter engine, however.
“If you look at the performance curve, there are not many engines out there that can deliver this much torque at such a low rpm (1625rpm),” Reil told Motoring. “But to do that the car is at the limit of the speed of the turbocharger now. The turbocharger is a relatively small one, for reasons of throttle response, and the performance in the RS 3 is at the limit of the rpms the turbocharger wheels can do in production.”
Reil also said they won’t use e-boosting or any type of electrical propulsion systems to increase the TT RS’ output. An electronically supplemented turbocharger works better on diesels, he says, and the TT is too small to properly house a 48-volt electrical system and lithium ion batteries. It seems as though the only way to bump the power of the 2.5-liter motor would be to pair it with a larger turbocharger.
It’s currently unknown when the TT RS could arrive, however the sporty TT S is expected to hit showrooms later this year.