Through a combination of mods and tuning, I built a Bruckell LeGran police car with a supercharged 4.3L diesel V6. The engine is a mod called LeGran 4.3 Diesel by STEVIE_G4M1NG, available at https://www.beamng.com/resources/legran-4-3-diesel.20341/. It's based on the real-life 4.3L diesel V6 found in mid-80s GM A-body cars. Not to be confused with the infamous 5.7L diesel V8, the V6 was a better design with fewer reliability issues. I've never owned one, but I've heard cars with that engine could return up to 40 MPG. Some real-life police departments did buy A-body cars for parking enforcement officers, process servers, and other special officers that didn't need the size or performance of a larger car. There's no record of any police department ever using a diesel A-body, but I theorize it would have been a good choice for the aforementioned uses. There was also never a forced-induction (turbocharger or supercharger) option on the real-life engines, but fortunately, a supercharger is an option in the BeamNG parts menu. It's still not quite fast enough to be a pursuit car, but an officer driving one could have theoretically kept up with an offender until officers in faster cars could catch up and take over. My less-than-stellar driving is largely due to my controller's worn-out steering stick. I had to set a relatively large deadzone to keep the steering straight. If you've ever played with a worn-out controller, you know. I know they're not very expensive, but I cannot afford a new one at this time.

A quick 0-60 acceleration run in my 1967 Ford Custom 4-door sedan with a 289 V8. At the time this was filmed, the car was bone-stock with a small two-barrel carburetor, relatively low shift points, and restrictive 2 inch single exhaust pipe. I would describe the acceleration as "smooth and leisurely." But it got 20 MPG, which is pretty good for a 1960s full-size car with a V8 under the hood and the aerodynamics of a brick. Since then I've installed a 4-barrel carburetor and had a nice dual exhaust system built. It's a little sportier now. It's a Custom, but I'm just going to call it a base-model Galaxie. It was common practice back then to assign different model names for trim levels of the same car. The Custom was the base model, then the Custom 500 which was a little nicer, then the Galaxie 500, then the Galaxie, and then the top-trim LTD (pronounced "El-Tee-Dee"). They were all basically the same car, just different trim levels and model names.