In FBI's early years (1930s) J. Edgar and others advocated for revolver ammunition capable of penetrating vehicle bodies to damage/disable engines. That likely was rooted in Prohibition enforcement, that era's rum-runners and their souped-up rides left an impression on crooks and lawmen both. These metalpiercing bullets and this mindset had much to do with developments like the S&W 38 Special N-frame "Heavy Duty" revolvers, which spawned the 357 Magnum.
Following on Bret's text, firing on vehicles can be problematic. If you manage to hit the driver and disable him, you have an unguided missile hurtling through sometimes heavy traffic. All bad. Face it--vehicle pursuits are a litany of mostly-bad choices. The current thinking is to use aircraft and let the goblin run while monitoring his movements. Spike strips flavor these exercises, and onlookers are amazed at how fast cars can travel on tireless rims.
Sometimes that ends poorly for the suspects--I was second car in a pursuit of armed robbery suspects in Rancho Mirage and Palm Desert in the early 1980s. Suspect vehicle was a stolen late-60s Mustang fastback. 9:15 at night in August, still 100*+ at that hour, traffic was very light. As the pursuit continued, both of the Mustang's rear tires had been destroyed somehow, probably by striking curbs as this maniac drifted through his many turns during this little affair. The guy was running on his rear rims, and still managing 70 MPH+. We crossed Ave. 44 northbound on Monterey against a red light, which we slowed for (suspect didn't). As he cleared the intersection we saw the a-- end of the Mustang start fish-tailing. No cross-traffic, so we punched the gas to catch up. The fish-tailing continued and got more exaggerated, and as the Mustang got cocked 80*-left the Sam Peckinpah slow-motion effects onset--everything seemed to slow way down. The far side of the Mustang must have dug in, because the near side began rolling. Wheels lifted......driver's head and shoulders extended out of his window. I saw his eyes wide and mouth agape, then he spun out of view as the Mustang continued to roll....three times before coming to rest on its wheels. Driver was a gone-er, probably killed instantly on the first rollover. Skulls aren't made to withstand that sort of abuse. His lady friend in right front was quite alive, and was a total bee-otch to the deputies that dragged her out of the passenger window. Cocaine, beer, and snap-rolls in a fleeing vehicle might affect someone's mood, so we make allowances. She went to jail via the hospital overnight; seat belts do save lives. IIRC, she had been the actual robber/armed and displayed. I didn't go to court on the matter.
All this to say........if we had managed to disable that engine with gunfire at the git-go, Homeboy might today be bouncing his grand-baby on his lap, and his paramour wouldn't have answered in court for a second degree murder beef. Ramifications........so unpredictable.