Audi is now offering a TDI e version of its large A6 sedan with the same 2.0L diesel
engine that is being installed in the Jetta TDI
here in the US market. In the A6, the engine is rated at 134 hp, slightly less than 140 hp available in the Jetta. The high efficiency e-badged variant of the A6 gets the usual array of changes that these eco-versions get: the four cylinder diesel is complimented by a six speed manual gear box with wider gear ratio spacing; lower rolling resistance tires; and a sport suspension with lowered springs that bring the body down for less aerodynamic drag. A brake energy regeneration system like that used by BMW charges a higher-capacity 12V battery to reduce parasitic losses. Britain's What What Car?
magazine had a chance to drive the A6 TDI e, which is rated at 44.4 mpg (US) on the EU combined cycle, and found it handles well and is quiet, but the sport suspension is somewhat stiff and acceleration is leisurely due to the small engine and tall gearing.
[Source: What Car?