Cops don't care about TVIs, they care about pasty-white doughnut-fed ass room in the seats... which is why the only way you could get a Charger with a bench seat and a column shift (at least for the first couple years) was if you ordered the police package. They also want cars far more capable than they are; the cop Impala is limited to 118MPH and can't be ordered with the V8 available in the SS; the Crown Vicky is outdated and can barely breach 125 per, wallowing like a pig the whole way (that chassis is over 20 years old). Having a 150+ "barrel extension" like a Hemi Charger or Challenger just feeds on the same ego as letting them carry a gun and "be" the law.
As with the Mustangs and Camaros of yore, and even the odd Corvette, it's more about making a statement than it is about actually catching someone. Cops rely on the old adage "You can't outrun the Motorola" more than they do horsepower and driving skills. Yet I know several people that have outrun the radio, including one person who outran 3 departments in two states in less than 5 minutes. :toot: