Audi is introducing its most potent V6 diesel yet to the Audi A6 and A7 range. The three-litre twin-turbo unit, mated to an eight-speed tiptronic transmission, produces 309bhp at 3900-4500rpm and 479lb ft of torque between 1450 and 2800rpm.
It helps the A6 saloon to clock 0-62mph in 5.1secs. That makes it faster than the equivalent 3.0-litre BMW 535d, which has a claimed 0-62mph time of 5.5secs.
Like Audi’s existing TDI engines, the new V6 will feature start-stop and achieves a claimed combined economy figure of 44.1mpg across all A6 and A7 models. The biturbo TDI also features a sound actuator that makes the diesel exhaust note to a noise closer to that of a high-performance petrol engine.
All biturbo models will include satellite navigation with a 6.5-inch screen, Milano leather upholstery, Audi’s drive select adaptive dynamics system, light and rain sensors and keyless go. Audi’s optional rear sports differential, for sharper handling, is also available.
The new BiTDI engine is available in conjunction with SE and S line specification in the A6 Saloon, A6 Avant and A7 Sportback. The A6 allroad Quattro, which goes on sale this month, will get the powerplant later in the year.