I used Lego Digital Designer (LDD) to model a 1990 Jeep Grand Wagoneer. It features an opening hood (bonnet) and rear tailgate, a working V4 engine, and folding front seats. It uses 643 parts and has 216 steps in the LDD Building Guide. The LDD .lxf Building Instruction file is available for download via Rebrickable, or via SkyDrive here. I used the LDD to POV-RayTM Converter (LDD2PovRay) software for these sharp renders:
The working V4 engine moves when the rear axle turns. You can see the Lego Technic elements used:
The real vehicle looks like this (note that the camera created a slight "fisheye" effect and the proportions are distorted a tad):
Here are some LDD screenprints of the 12-studs-wide, 35-studs-long, 9-2/3 bricks high model. One can see the slanted, folding seats and other details: