Audi's Q3 compact crossover, launched at the Shanghai show this week, incorporates automated coasting to improve fuel economy and cut CO2 emissions.

An optional multi-mode vehicle dynamics control system and S-tronic dual clutch transmission work together to provide an 'efficiency mode' in which the Q3 declutches when the driver lifts off the throttle, reducing fuel consumption.

The Q3 is also available with a six-speed manual transmission. Power comes from a choice of two petrol and one diesel engines from Audi's existing TFSI and TDI ranges.

The Q3, which will go on sale in the UK in November with prices starting at around £25,000, will be built at the Seat plant in Martorell, Spain.