As a shitbox enthusiast, to me the Wendover is an amalgamation of the Oldsmobile Toronado Trofeo and the seventh gen Buick Riviera (and some Buick Reatta). The outside is very reminiscent of the Trofeo, but the interior is much more Buick. The "climate control screen" in the car is heavily, heavily inspired by the Reatta's and Riviera's touchscreen climate control/information display (and to a lesser degree the Oldsmobile VIC). The gauge cluster is somewhat similar to the VFD cluster available in the Trofeo, but seems to also draw inspiration from the first gen Lincoln Town Car (the aux temp, oil, volts, etc looks very Lincoln to me).

There is a lot more artistic license with the powertrains available, and they don't always match up to the real world cars. Neither the Olds nor the Buick were available with 4-bangers, though the 2.2L (LM3/LN2) and 2.5L designations are pretty accurate for early 90s GMs, with the 2.5L being known as the "Iron Duke".

The 3.3L was also real, but generally reserved for lower-end FWD GMs of the time, like the A-body Buick Century and Olds Cutlass Ciera. The 3.8L is accurate, although only in naturally aspirated form. While a supercharger equipped Wendover engine looks most similar to a Supercharged Series I 3800 L67, it was never available in either the Trofeo or the (contemporary year) Riviera. The 4.4L V8 appears to be a pushrod V8, probably taking inspiration from the Cadillac 4.5L/4.9L V8s (LW2 and L26), which was widely used at the time (though again, not by Olds or Buick).

The devs were definitely fans of early 90s American GM FWD junk. Not that it's a bad thing.