By 2018, the Q7 will no longer be the biggest crossover Audi has to offer as the Ingolstadt-based automaker is currently working a bigger crossover and will serve as the brand's new flagship SUV. While no official name has been announced, our spies tell us that it may be called the Q8.

Audi Q8 front 3/4ths

With parent company Volkswgen shifting toward modular platforms, it is likely that the Q8 will ride on the new MLB Evo platform. This platform is currently being used on the Audi Q7 and Bentley Bentaya. It will also serve as the basis for the 2018 Audi A8, the upcoming third generation Volkswagen Touareg and the recently spied next-generation Porsche Cayenne.

Audi Q8 side profile

Since its debut is still two years away, what you see here is a test mule. Using a Q7 as its basis, one will notice the extended fenders, hinting that the Q8 will at least be wider than the Q7. It is also possible that the Q8 will be longer than the Q7. As for its exterior, expect Audi's biggest crossover to have cues from the automaker's current design language and the front end to have a similar treatment from the A8.

Audi Q8 rear 3/4ths

Powertrains will most likely be shared with other Audi models. These include a turbocharged V6 as seen in the Q7 and a V8. Turbodiesels will also be available, as well as a hybrid option. The engines are said to be co-developed with Porsche. A plug-in hybrid model is to be expected as well, also co-developed with Porsche.