Audi has revised its 3.0-litre V6 TDI engine in order to reduce emissions and improve fuel economy.

The more efficient 2008 model year Q7 3.0 TDI quattro, which is also now equipped with an exhaust-cleansing Diesel Particulate Filter (DPF), is available for order in standard, SE and S line trim priced from £38,075 OTR to £41,475 OTR.

Audi says the new 3.0-litre ramps efficiency up to 34.9mpg from 33.6mpg and reduces CO2 output from 279g/km to 260g/km. Power has been boosted slightly from 231bhp to 238bhp.

The efficiency drive is part of a Q7 development programme which also includes a 3.6 FSI petrol/electric hybrid engine that is expected to join the SUV range in 2008.

The more powerful, more economical and cleaner 2008 model year Q7 3.0 TDI quattro.

The Q7 petrol electric hybrid which Audi hopes will cut emissions by 20%.