I grabbed a tape measure and did a quick check. The rear sill where the hatch closes is curved. Right at the tailgate latch in the center, it's about 82". But on the furthest left/right ends of the hatch opening, it's maybe 76"-77". And that might not include 1"-2" where the plastic on the rear hatch door intrudes into the cargo space. These measurements are approximate and measured to where I have the front seats. If the front seats are pulled forward a bit, it will be close but it might work for you.
...maybe... might... a little goosey to base a buying decision on...I grabbed a tape measure and did a quick check. The rear sill where the hatch closes is curved. Right at the tailgate latch in the center, it's about 82". But on the furthest left/right ends of the hatch opening, it's maybe 76"-77". And that might not include 1"-2" where the plastic on the rear hatch door intrudes into the cargo space. These measurements are approximate and measured to where I have the front seats. If the front seats are pulled forward a bit, it will be close but it might work for you.