At 80 km/h or about 50mph, the A6 50 TDI is drinking anywhere between 3.5 and 4.5 liters. Bump that up to 120 km/h (74 mph) and it's still a reasonable 6 l/100km (39mpg).

VEHICLE ANALYSIS: Audi A6 3.0 TDI quattro The facelifted A6 range is now on sale in Britain. As well as the styling changes, emissions are claimed to be up to 22% lower, Matrix headlights are a ...

The claimed top speed is 244 km/h with 0-100 km/h taking 8.2 seconds. Next up, the mild-hybrid 2.0 TDI outputs 150kW/400Nm on its own, but can be had with quattro four-wheel-drive as an option.

READ THIS: Emission updates for 2015 VW, Audi 2.0-liter TDI diesels OKed by regulators The settlement announced today consists of two separate agreements.

Audi is betting big on diesel, and Motor Trend has just finished a Quick Drive of the 2014 Audi A6 TDI. Read our road test impressions here.

2014 Audi A6 TDI vs BMW 535d: Are modern diesel engines refined enough to sit under the hood of your next luxury sedan ...

The A6 TDI clean diesel has an eight-speed Tiptronic automatic transmission with quattro all-wheel drive.

The exterior of the 2014 Audi A6 TDI Prestige has sharp body lines. ROAD TEST EDITOR JONATHAN WONG: This 2014 Audi A6 TDI Prestige was a sled in the snow that got dumped on us.