We moved 500kg of tiles in a corolla once. At least I think it was 500, could have been 200, it was a few years ago. About 18sqm of floor tiles + grout + adhesive.
Anyway, we had to distribute them evenly throughout the car to get the load balanced, allowing for extra humans too. The other half got stuck in the back seat because we needed to put a heap in the front, corollas are front wheel drive. Back then we were 50 and 60kg so we barely made a difference with a load that size ...
That was a long, slow, careful drive. We got tiles for the rest of the house delivered - was worth it, it was an entire bloody pallet.
*sits and dreams of utes big enough for 3 kidlets and a good load too*