Joining the regular A7 and the nearly-as-tough S7, the RS 7 Sportback takes the lead with Audi's twin-turbo 4.0 litre V8 engine.
In RS 7 form, the engine delivers a red-hot 412kW and 700Nm of torque, putting it well ahead of the S7's 309kW and 550Nm figures.
With that under-the-hood headstart, the RS 7 offers a claimed 0-100km/h time of 3.9 seconds, compared to 4.6 seconds for its R-less sibling.
Top speed is listed at 250km/h in its regular form, but opting for the Dynamic package will boost that number to 280km/h - while the Dynamic Plus option will push it through to 305km/h.
And, if it somehow matters to any of the RS 7's potential buyers, fuel consumption is rated at a low 9.8 l/100km, thanks in part to the engine's Cylinder On Demand deactivation system.
The RS 7 rides on performance tuned air suspension, lowering the body by as much as 20mm below standard.
Adaptive damping is standard even with that kit, but steel-sprung sports suspension with three-stage adjustable dampers and dynamic ride control is also available.
Braking is managed by massive 390mm vented discs at the front, but 420mm carbon rotors can be optioned.
On the styling front, the big four-door performance coupe gets the familiar RS tweaks, including a honeycomb grille, new bumpers and bigger wheels available in either 20- or 21-inch sizes.
An Australian debut is expected to occur early in 2014.
- Related News & Reviews at TMR ▼
- RS 7 | A7 range | Audi | Audi RS models | Performance
- Detroit Auto Show
- Interested in buying AUDI ? Visit our AUDI showroom for more information.