The 420 badge on Audi’s TT quattro sport concept isn’t a drug reference; it’s the horsepower rating

Audi knows fans want a production version of the 700-horsepower sport quattro concept from the 2013 Frankfurt Motor Show, and apparently decided to appease them by tacking the same words onto the new 2015 TT.

The Audi TT quattro sport concept hints at a performance version of the compact sports car that could take over for the cult-favorite TT RS.

Under the hood is a 2.0-liter TFSI turbocharged four-cylinder engine, which pumps out 420 hp and 331 pound-feet of torque. That’s 110 hp and 51 lb-ft of torque more than the 2015 TTS,

That also equates to an astonishing 210 hp per liter, which Audi says is more than its 2001 Le Mans-winning R8 race car. It will get the 2,963-pound TT quattro sport from 0 to 62 mph in 3.7 seconds.

The steroidal engine is attached to an S tronic dual-clutch transmission, and Audi’s quattro all-wheel drive system. In this application, it features torque vectoring to help rotate the car slightly in corners.

To adequately warn innocent bystanders, the TT quattro sport was treated to some visual enhancements, including a carbon-fiber reinforced front splitter and rear diffuser, larger front air intakes, a massive rear spoiler, and flared wheel arches.

There’s also a “420” decal on the bottom edge of the door that boasts of the TT’s power in classic American muscle car style. Either that, or Audi is declaring its support for the legalization of marijuana.

Befitting a high-performance concept car, the interior is stripped to the bare essentials.

The 12.3-inch digital instrument cluster and multifunction steering wheel remain, but the door armrests and speakers are gone. Using a trick from corporate sibling Porsche, Audi replaced the door handles with strips of Alcantara.

Audi was mum on the possibility of putting the TT quattro sport concept into production. Hopefully it will give it the green light, and the sport quattro too.