Audi's all new A4 will become the first model range to be totally Euro5 compliant - making it eligible for expected benefit-in-kind tax breaks for greener company cars.

All three diesel and two petrols meet the tough new emissions standards. Audi has yet to release complete CO2 figures for the new A4, however it has confirmed the 143PS 2.0-litre diesel - likely to be the biggest seller - will be capable of 51.4mpg with a 144g/km CO2 output.

BusinessCar Awards winning Audi will offer even more efficient versions of the A4 in the future, but remains tight lipped about which engines will power them.

The new A4 is longer and wider than the current model providing more room for passengers and luggage. Audi claims shoulder room and leg room for rear passengers is increased, the latter by 36mm, while the boot capacity is 480 litres (up from 460) and 962 with seats folded.

On sale on the Continent in November, UK buyers will be able to order a car from 11 September this year, but first deliveries aren't expected until March 2008. The estate version is understood to be six months behind the saloon.