While this early test mule wears bodywork from the current car, it is understood to be testing chassis components for the new model. Like the new A4, the next A5 will be based on Volkswagen Group's second-generation MLB platform.
Engines for the new model should also be shared with the A4. That means a range of longitudinally-mounted 1.4, 1.8 and 2.0-litre TFSI units will feature alongside 1.6 and 2.0-litre diesels.
At least some of the petrol options will also get cylinder shut-down technology, with CO2 emissions of less than 100g/km also probable from one or more models - both moves are part of an increased drive for efficiency from Audi.
A plug-in hybrid model is also planned, using the same 1.4-litre, 148bhp petrol-electric powertrain as the A3 e-tron. A diesel-electric option is also in development. Like the A4, transmission options should include six-speed manual and nine-speed automatics. Both front- and four-wheel drive variants will be offered.
Inside, Audi will likely continue to use its more recent cabin architecture, and the new A5 could come equipped with the same all-digital instrument cluster and infotainment interface as the third-generation TT. Expect a heads-up display to be offered, too.