Although this car appeared in Flatout, it wasn't playable. This Ramduster deserves some "drive-time." (Yes, this is the Mexican version. Don't question, we need more cars from Mexico and Canada in racing games.)
Gran Turismo 2, 4, 5, and 6 have all had a Taurus SHO. Ford Racing 3 had a Taurus stock car if that counts, along with (predictably) the NASCAR games made around that period. Wasn't the Cadillac DTS in Driver: San Francisco?
Racing is kind of part of the game, similar to the GTA series. The Bugatti Type 74. This weird concept accordingly, has NEVER been in a game, considering it has a striking resemblance of having nearly the same rear as the Veyron and Chiron. Nor the Type 73a/c.
Took a look through the Lamborghini page on that site... didn't see this... Lamborghini Jarama It's no fun playing a game like this if you just name off little nobody cars from boring manufacturers.
Supercharged version from '04 or thereabouts makes an appearance in the 2005 racing game Ford vs. Chevy. I don't blame you if you've never heard of it; it was pretty garbage. Most of the decisions involved were wrong, the final product needed polish badly, and the painful redneck stereotypes involved in the pathetic excuse for a storyline seemed designed to either patronize or alienate the only people that could have been their target market. And also, the game had little bits of unexpected Japanese influence peeking through the cracks, giving the impression that the developers really didn't know rural America or just didn't care. It's rather jarring when you get skill points for "Kansei Drift!" and you're driving a 1936 Chevy High-cab Pickup (which does drift pretty nicely in that game, actually), and I actually had to look up what "choku-dori" meant, which is pretty sad for a game set in Generictown, USA and revolving around what is effectively a hillbilly gang war fought on the racetrack.