A new report out of Germany suggests Audi is planning to drop a V6 diesel engine (as used in the recently revealed SQ5 TDI) into the three derivatives in its S5 range.

According to Automobile Magazine, the S5 Sportback, coupé and cabriolet will all be offered with Ingolstadt’s oil-burning six-cylinder, which also employs an electrically powered compressor to ensure maximum torque is available from low in the rev range.

In the case of the SQ5 TDI, this 3,0-litre engine makes 255 kW and 700 N.m, fed to all four corners via an eight-speed automatic transmission.

The French magazine says Audi’s motivation to use this new powertrain stems from an effort to cut fuel consumption and CO2 emissions, with regulations in Europe continuing to tighten.

Of course, Audi Sport has so far offered diesel engines only in S-badged SUVs (the SQ5 TDI and SQ7 TDI). If this latest report does indeed turn out to be true, the S5 will be the first non-crossover in the performance range to adopt diesel power.