It had the A6, but the thermostat got stuck and blew the head gasket. It's replaced with an A1, but with all the parts from the A6 making it an A6 again. Rear discs, yup. Not sure if someone switched the interior or not. Didn't even come with a Bose system either. They might not have come in the 91's. Came with the fogs in the front bumper though.