Rather than repeating their mistake with the first-gen Q7 and developing pointless high-performance versions of the SUV, Audi is taking a different approach with the new model; an approach that has resulted in the Audi Q7 e-tron Quattro, the world’s most fuel efficient production SUV.

Unveiled at the Geneva Motor Show, Audi Q7 e-tron Quattro is powered by a diesel engine. But unlike its predecessor which boasted a huge V12 TDI unit, this car has a much more sensible 3.0 liter V6, mated to a disc-shaped electric motor located between the engine and the eight-speed tiptronic. It is actually part of the transmission.

Together these two motors develop a combined output of 373 PS  and 700 Nm (516.3 lb-ft) system torque. That is enough for a more than satisfying 0-60 mph acceleration time of 6.0 seconds and a top speed of 139 mph. But the real beauty of this system is the fuel economy, which is 166mpg combined, corresponding to CO2 emissions of under 50 grams per km, 34 miles of pure electric drive, and a range of 876 miles on one tank of fuel. Those are outstanding numbers for such a big car.

Audi Q7 e-tron Quattro which is a plug-in hybrid, meaning you can charge up its batteries by plugging it in any power outlet, has four driving modes controlled via the MMI infotainment system, which also features advanced connectivity capabilities and highly detailed navigation. The e-tron Q7 is as practical and well-equipped as any regular models. It will go on sale in Europe and UK in late 2015.