Audi has added a more frugal version of its 3.0-litre diesel engine to its all-new Q7 large off-roader range.

The new 218hp engine emits 148g/km of CO2, returns 49mpg and is priced from £47,755 when it goes on sale in October.

Previously, the only engine available in the Q7 was the more powerful 272hp version of engine. It emits 153g/km. returned 47.5mpg and is priced from £50,340.

Earlier this year, Audi revealed a plug-in hybrid version of the Q7, which is also expected to go on sale by the end of this year.

It is powered by a 258hp 3.0-litre oil burner, which is mated to a 94kW motor and eight-speed automatic gearbox. Audi claimed it is capable of travelling 34.8 miles on electric power alone, and claimed this is a record in the segment.

The German car maker said the plug-in hybrid model is capable emitting less than 50g/km of CO2.

When it goes on sale, it will become Audi’s second plug-in hybrid after the A3 e-tron, and the firm’s first plug-in diesel hybrid.