This is a Peterbilt 379 in with working dump body, steering and driving. It has one Lego PF XL engine and two medium ones. Battery box is under the hood, and sensor in the cabin. It still has nice interior and a massive chromed dumpbox.
The new book The Art of LEGO Modeling by Dennis Glaasker and Dennis Bosman (out in September on No Starch Press) is chock-full of Alfa Romeos, and other mechanical wonders rendered perfectly in blocks.