Bentley's controversial crossover is inching closer to production as our spies have managed to snap some pictures of a chassis testing mule based on the Audi Q7.

Bentley's controversial crossover is inching closer to production as our spies have managed to snap some pictures of a chassis testing mule based on the Audi Q7.

While there isn't much to see, the prototype has a modified front bumper and a four-tailpipe exhaust system. That's not much to go on but previous teaser images have revealed the model will have a Continental GT-inspired front fascia with a prominent grille.

Engine options remain unconfirmed but could include a twin-turbo 4.0-liter V8 engine with 500 bhp (373 kW) and 660 Nm (487 lb-ft) of torque. Outgoing Bentley CEO Dr Wolfgang Schreiber has also confirmed plans for a plug-in hybrid variant but little is known about it.

Regardless of the final specifications, Bentley has said the model will be the "most luxurious and powerful SUV on the market." The company also noted it will embrace "luxury, performance, quality and craftsmanship."

The crossover will be built in Crewe and go on sale in 2016.

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