That 38xx number is the Gross Vehicle Weight Rating. That is the Maximum weight the car is rated for with a 2 People, a Full tank and Cargo Load. The passenger load is only rated at 450 lbs. So 2 people of relative size, technically overload it.

I weighed my coupe with me in it and a full tank on the scales at MIR and it rang in at 3450, which is about right. I weigh 260, so that explains alot.