The Jaguar C-X17 crossover is just a concept, but it's one that has a big chance of production. Photo credit: Jaguar.

Ever since India's Tata Motors (TTM) bought Jaguar from Ford (F 0.69%) a few years ago, one big question has gone unanswered: Would Tata really be willing and able to spend the money needed to turn Jaguar into a credible rival to the likes of BMW (BAMXF 3.93%) and Audi?

This past week at the Frankfurt Motor Show, Jaguar showed off part of the answer: A new platform that will underpin a host of new Jaguars, including a serious rival to BMW's 3-Series and Audi's A4. As Fool contributor John Rosevear explains in this video, that's a crucial move for Jaguar -- and the surprising crossover SUV shown above could turn out to be just as important.