Watch a Tuned Audi RS3 Give the Dodge Challenger Demon a Run For Its Money

The Audi RS3 is a fast car, but it’s not really a drag racing superstar. The aftermarket can change that. Audi and Volkswagen tuning specialist APR threw a slew of modifications at an RS3, and the result is a pint-sized sedan with 600 horsepower that can run the quarter-mile in less than 10 seconds.

The APR RS3’s sub-10-second time could have it worrying the 840-hp Dodge Challenger SRT Demon, which Dodge claims is capable of a 9.65-second quarter mile.

To put that in perspective, a stock RS3 has 400 hp and, according to Road & Track, runs the quarter-mile in 12.1 seconds. Audi asserts that the stock RS3 will do 0 to 60 mph in 3.9 seconds, but APR boasts that its tuned version will do the job in just 2.4 seconds.

Not surprisingly, that level of performance required extensive modifications. The RS3’s 2.5-liter turbocharged inline-five got new turbo internals, an upgraded fuel system and intercooler, and a tuned ECU set up for E85 (85 percent ethanol, 15 percent gasoline). The rear seats were also removed to save weight (who needs practicality?), and the car has a straight-pipe exhaust. APR also fitted Hoosier drag radials to all four wheels of this all-wheel drive car. It’s kind of funny to see those tires on a German sports sedan.

All of this adds up to a car that made eight quarter-mile passes of less than 10 seconds during a session at Montgomery Motorsport Park in Montgomery, Alabama. The RS3 was driven by its owner, Keith Brantley. Of the eight passes, the quickest was a 9.83 seconds at 144.39 mph. That’s just 0.18 off Dodge’s claimed quarter-mile time for the Demon.

APR did not quote a cost for its tuned RS3, but considering the long list of modifications and the fact that a stock RS3 starts at $54,900, building your own probably won’t be cheap. You may end up spending close to the $84,995 base price of a Demon, although you’ll end up with a car that’s a bit more subtle. It really comes down to preference for Dodge or Audi, factory or aftermarket. Because whether it’s a muscle car with a factory warranty or a tuned sports sedan, speed usually doesn’t come cheap.