The TDIe beats the BMW 5-Series and Mercedes E-Class in most respects. Off the line, it propels the A6 from 0-62mph in 10.3 seconds, yet returns 53.3mpg on the combined cycle and has emissions of 139g/km.
These figures are helped by a new six-speed gearbox, low-rolling resistance tyres, a more efficient power-steering pump and an alternator that charges the battery while the car is coasting.
The TDIe also has improved aerodynamics, thanks to a 20mm lower ride height than other A6 models, improved suspension and special spoilers which reduce drag.
Source: Auto Express