Audi BiTDI V6 engine

If you're in the market for a new car and diesel's among the options you'd consider, your local Audi showroom should be among your first destinations. The German automaker has made burning oil a cause célèbre right up there with Quattro all-wheel drive, but it's not about to sit on its proverbial laurels and let the competition catch up. To that end, Audi has just announced its most powerful V6 TDI yet.

Called the BiTDI, the 3.0-liter, six-cylinder twin-turbo-diesel packs 313 metric horsepower (309hp on our scale) and a whopping 480 pound-feet of torque. It's being rolled out initially in the UK on the A6 (sedan, Avant wagon and Allroad high-rider) and A7 Sportback, but we're told to expect its arrival soon as an option on the Q7 crossover.

In the A6 sedan, the BiTDI is said to be good for a 5.1-second dash to 62 mph, with top speed (as per usual) limited to 155 mph while returning a 44.1 mph rating on the combined UK cycle. But if that's not full enough a package for you, Audi has also fitted a sound actuator to give its throaty new diesel the exhaust note you'd expect from a hi-po gasoline engine. But you don't have to take our word for it – just click through the jump to listen to a sound file of the new engine, as well as read the official press release.




The new 3.0 BiTDI engine
by Audi UK
Show full PR text
NEW BI-TURBO TDI PACKS EVEN MORE PUNCH INTO AUDI A6 AND A7 SPORTBACK

The most potent Audi V6 TDI ever to enter production powers executive class Audi models to 62mph in a fraction over five seconds and returns up to 44.1mpg

- Advanced new biturbo TDI engine heads diesel line-up in A6 Saloon, Avant, allroad quattro and A7 Sportback ranges – OTR prices from £43,810
- Available now in A6 Saloon and Avant and A7 Sportback, and later in 2012 in A6 allroad – first deliveries in spring
- 313PS from 3,900-4,500rpm, 650Nm from 1,450 to 2,800rpm
- A6 Saloon 3.0 BiTDI quattro – 0-62mph in 5.1 seconds, governed 155mph top speed, combined MPG 44.1, CO2 169g/km
- Sound actuator in exhaust system accompanies remarkable performance with sports car exhaust note

Knockout punch in a velvet glove comes courtesy of a formidable new 313PS Audi biturbo TDI engine, which is now available for A6 Saloon and Avant and A7 Sportback models. The new twin-turbo V6 is notable not only for being the most powerful six-cylinder diesel engine ever offered by the Vorsprung durch Technik brand, but also the sweetest-sounding. Available now in A6 models priced from £43,810 OTR, and from £51,645 OTR in the A7 Sportback, it combines trademark Audi TDI refinement with an exhaust-mounted sound actuator that enables it to deliver its mighty 650Nm output to the tune of a distinctly sporting soundtrack.

Slotting in above the single-turbo 204PS and 245PS versions of the 3.0 TDI that already feature in the A6 and A7 Sportback ranges, the latest V6 has a two-stage turbocharger group that delivers a maximum boost pressure of up to 3.2 bar, helping the A6 3.0 BiTDI quattro Saloon to lunge at the horizon and pass the 62mph marker in as little as 5.1 seconds, and the A6 Avant and A7 Sportback to do the same in just 5.3 seconds. An electronically limited top speed of 155mph is common to all versions.

Like the existing TDI engines, the new star performer is backed up by technologies from the Audi modular efficiency platform, including start-stop and recuperation systems and the innovative thermal management system that quickly brings the coolant and oil up to their operating temperatures. With their help, combined economy in A6 and A7 Sportback models is on an equal footing at 44.1mpg – an impressive figure given the high outputs and low acceleration times involved.

Sound actuator

Thanks to an innovative actuator in the auxiliary channel of the exhaust system, the BiTDI A6 and A7 Sportback models don't sound like they should be capable of such level-headed economy figures. The actuator system essentially consists of a speaker which imposes a defined oscillation pattern on the exhaust flow and transforms the typical TDI exhaust note into a more sonorous roar that is closer to the output of a high-performance petrol engine.

Without exception, power is transmitted from the BiTDI engine via an eight-speed tiptronic transmission to the latest generation quattro all-wheel-drive system, which features a self-locking centre differential and torque vectoring for optimum traction and stability. A sport differential which distributes power in continuously variable proportions between the rear wheels is available from the options list to sharpen and quicken response even further.

The mighty new BiTDI engine is available in conjunction with SE and S line specification in the A6 Saloon, A6 Avant and A7 Sportback. The forthcoming A6 allroad quattro, due to open for order in February, will also offer this exceptional unit.

Stand-out features common to all these models include satellite navigation linked to a 6.5-inch retractable colour monitor, Milano leather upholstery, the Audi drive select adaptive dynamics system controlling throttle response, transmission shift points and steering feel, the Audi parking system plus, light and rain sensors, cruise control and keyless go push-button engine ignition.

AUDI A6, A6 AVANT AND A7 SPORTBACK – UK OTR PRICING

MODEL TRIM PS TRANSMISSION CO2
(g/km)
ECONOMY
mpg
(Combined)
OTR
A6 Saloon 3.0 BiTDI quattro SE 313 8 sp Tiptronic 169 44.1 £43,810
A6 Saloon 3.0 BiTDI quattro S line 313 8 sp Tiptronic 169 44.1 £46,160
A6 Avant 3.0 BiTDI quattro SE 313 8 sp Tiptronic 169 44.1 £45,650
A6 Avant 3.0 BiTDI quattro S line 313 8 sp Tiptronic 169 44.1 £48,000
A7 3.0 BiTDI quattro SE 313 8 sp Tiptronic 169 44.1 £51,645
A7 3.0 BiTDI quattro S line 313 8 sp Tiptronic 169 44.1 £53,435